Tools & Applications 1. Introduction 2. Design of Matrix Turbines
|
|
- Johnathan Matthews
- 5 years ago
- Views:
Transcription
1 NATIONAL TECHNICAL UNIVERSITY of ATHENS Lab. Thermal Turbomachines Parallel CFD & Optimization Unit Design Optimization Tools & Applications 1. Introduction 2. Design of Matrix Turbines Kyriakos C. Giannakoglou Professor NTUA
2 Introduction to Optimization Problems/Methods From the Analysis to the Design-Optimization Single Objective Optimization, SOO Multi Objective Optimization, MOO Multi Disciplinary Optimization, MDO TERMINOLOGY: Understand d the difference: Optimal Design of a Car Design of Optimal Car Optimal Design of an Optimal Car Optimal Design of an Optimal Car Shape K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 2
3 What is Optimal (Car)? Objective Function The one with max. speed The one with min. fuel consumption The most comfortable one The less expensive The one with min. emissions Optimality : an Objective function (min ή max F) must be carefully defined!!! Objective Function F Cost Function (min) Fitness Function (max) But what if more than one objectives? K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 3
4 Transforming a MOO problem to a SOO one Example: Design of Optimal Wing max C L min -C L min 1/C L max C L min C D min C D min C D max -C D min C D + w/c L min C D + 1/C L min C D + 10/C L min C D subject to: C L =1.2 min C D subject to: C L >1.2 K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 4
5 Objective Function Objective: Minimum DRAG Objective Function: DRAG Coefficient min F=C D K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 5
6 Design (or Optimization) Variables Shape Parametrization Β Α θ y B y A x A x B L N=6 degrees of freedom (dofs) K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 6
7 Evaluation Evaluation Tool: Code for the numerical solution of the Navier-Stokes eqs. Viscous Stresses C D = carcontour forces K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 7
8 Evaluation L x A y A x B y B θ b = b1= b2= b3= b4= b5= b6= F=C D = K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 8
9 Constraints Constraints: Equality & Inequality Constraints!!! Feasible & Infeasible Solutions to the problem K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 9
10 Classification of Optimization Methods Gradient-Based Method vs. Stochastic Methods F(x) () Individual-based Methods vs. Population-based Methods x K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 10
11 Deterministic (Gradient-Based) Optimization F(x) () (if minimization) How to compute the gradient of F: Finite-Differencesit Complex Variable methods Automatic Differentiation Adjoint method x K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 11
12 Deterministic (Gradient-Based) Optimization Στόχος διατριβής Drag sensitivity map (a by-product of the adjoint method) Losses sensitivity map (a by-product of the adjoint method) (bridging the gap between modern design tools and an old-fashioned designer) K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 12
13 Evolutionary Algorithms A Gradient-Free Population-based Algorithm: K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 13
14 Evolutionary Algorithms Evaluation of the Population: F=0.29 F=0.33 F=0.36 F=0.50 F=0.45 F=0.42 K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 14
15 Evolutionary Algorithms Parent Selection: F=0.29 F=0.33 F=0.36 F=0.29 F=0.45 F=0.42 K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 15
16 Evolutionary Algorithms (Two Parents) Crossover (Two Offspring) K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 16
17 Evolutionary Algorithms Mutation K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 17
18 Evolutionary Algorithms The New Offspring Population K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 18
19 The Generalized (μ,λ) Evolutionary Algorithms Generation κ (λ offspring) λ evaluations Parent Selection (μ parents) Generation κ+1 (λ offspring) generated by applying evolution operators (Crossovermutation-elitism) K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 19
20 Multiobjective Optimization The Pareto Front Price Bugatti Veyron km/h VW Golf V km/h Simca km/h (Top Speed) 1 K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 20
21 Multiobjective Optimization The Pareto Front F 2, S ge Front 0 (Pareto) F 1 Front 1 Two-objective Example: min F 1, min F 2 Front 2 K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 21
22 Example: Design of Optimal Power Plants T P T T r P T P Three Objectives: (a) Max. efficiency, (b) Max. power output, (c) minimum investment Capital Cost (MEuro) T T Efficiency G2 Power Output (MW) Research funded by K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 22
23 Unfortunately: Conventional EA/ACO/PSO/BFO etc are computationally expensive, even on parallel platforms! This is where research is focusing during the last decade!!!!!!!!! K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 23
24 Metamodel-Assisted Evolutionary Algorithms (MAEAs) Evolution Evaluation Candidate solution Problem-Specific Evaluation Tool (Exact/Costly Model) Theroleormetamodels or during the evolution is, practically, to interpolate previously evaluated individuals (generated during the EA) for saving CPU cost. EA Fitness or Cost Value Metamodel or Surrogate Evaluation Tool (Approximate/Low-Cost) (F) rformance ( Pe Design Variable (b) K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 24
25 MAEAs with On-Line Trained Metamodels The concept of Inexact Pre-Evaluation within the evolutionary algorithm (EA-IPE or MAEA) K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 25
26 MAEAs with On-Line Trained Metamodels Generation 1 Generation 2 More generations must be performed by the EA; however, the majority of them relies on a limited number of calls to the problem-specific tool (CFD), so the CPU cost per generation is noticeably lower. Generation 3 Generatio n6 Generation 5 Generation 4 K.C. GIANNAKOGLOU: Design of Optimal Aerodynamic Shapes using Stochastic Optimization Methods and Computational Intelligence, Int. Review Journal Progress in Aerospace Sciences, Vol. 38, pp , K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 26
27 Distributed MAEAs (DMAEAs) Basic issues: Number of demes or islands Communication topology Communication frequency Migration algorithm EA set-up per deme M.K. KARAKASIS, A.P. GIOTIS and K.C. GIANNAKOGLOU: Inexact Information Aided, Low-cost, Distributed Genetic Algorithms for Aerodynamic Shape Optimization, Int. J. for Numerical Methods in Fluids, Vol. 43, pp , K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 27
28 Expected Gain in CPU Cost (EA/MAEA/DEA/DMAEA) Airfoil Shape Optimization (min. C D, fixed C L ) Flow Conditions M =0.75, α =2.734 o, Re= C L,ref =0.749, C D,ref =0.0235, β=2 Optimal Solution (SOO): C L,opt =0.744, C D,opt = EA-IPE = MAEA Evaluations K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 28
29 Hierachical EAs or MAEAs Hierarchical Evaluation Hierarchical Search Hierarchical Parameterization Navier-Stokes Turbulence Model Fine Grid, etc. GBM Finer Design Many Control Points Integral Method or Coarse Grid NS, etc EA or MAEA Knot Refinement Knot Removal Rough Design -Few Control Points K.C. GIANNAKOGLOU and I.C. KAMPOLIS, Multilevel Optimization Algorithms based on Metamodel- and Fitness Inheritance-Assisted Evolutionary Algorithms, in Computational Intelligence in Expensive Optimization Problems, Editors: Y. Tenne, C.-K. Goh, Springer-Verlag Series in Evolutionary Learning and Optimization, K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 29
30 Design-Optimization of Matrix Hydraulic Turbines Hydromatrix : a number of small, axial flow turbine generator units assembled in a grid or matrix. Advantages compared to conventional designs (lower cost to power ratio): 1. Minimization of the required civil construction works. 2. Minimum time for project schedules, construction and installation. 3. Small geological and hydrological risks. 4. Minimum environmental inflict. K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 30
31 Design-Optimization of Matrix Hydraulic Turbines Parametrization: Bezier curves are used to parameterize the spanwise distribution ib ti of: mean camber surface angles at LE & TE. circumferential position of the blade LE & TE. mean camber surface curvature. Blade thickness distribution. Total: 52 to 74 design variables K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 31
32 Design-Optimization of Matrix Hydraulic Turbines Objective 1 (G 1 ) : Minimization of the weighted sum of the deviations of the outlet swirl and axial velocity distributions from target curves Objective 2 (G 2 ): the standard deviation of the pressure distribution along the chordwise direction, at eleven equidistant spanwise locations Objective 3 (G 3 ): cavitation index K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 32
33 Design-Optimization of Matrix Hydraulic Turbines Full Load Part Load Best Effic H [m] Q[m 3 /sec] Part Load Best Efficiency Full Load (3 objectives) x (3 operating points) = 9 objectives in total K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 33
34 Design-Optimization of Matrix Hydraulic Turbines F 2 = f(g 3 ) at the three operating points Solution 1 Solution 2 Solution 3 F 1 = f(g 1,G 2 ) at the three operating points K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 34
35 Design-Optimization of Matrix Hydraulic Turbines (1) (2) (3) K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 35
36 Design-Optimization of Matrix Hydraulic Turbines NTUA The Evolutionary Algorithm SYstem K.C. Giannakoglou, Parallel CFD & Optimization Unit, NTUA, Greece 36
NATIONAL TECHNICAL UNIVERSITY OF ATHENS (NTUA) Low-Cost Evolutionary Algorithms for Engineering Applications
NATIONAL TECHNICAL UNIVERSITY OF ATHENS (NTUA) SCHOOL OF MECHANICAL ENGINEERING LAB. OF THERMAL TURBOMACHINES PARALLEL CFD & OPTIMIZATION UNIT (PCOpt/NTUA) Low-Cost Evolutionary Algorithms for Engineering
More informationI. Introduction. Optimization Algorithm Components. Abstract for the 5 th OpenFOAM User Conference 2017, Wiesbaden - Germany
An Aerodynamic Optimization Framework for the Automotive Industry, based on Continuous Adjoint and OpenFOAM E. Papoutsis-Kiachagias 1, V. Asouti 1, K. Giannakoglou 1, K. Gkagkas 2 1) National Technical
More informationP. Grafenberger*, E. Parkinson**, H.A. Georgopoulou, S.A. Kyriacou and K.C. Giannakoglou
Constrained Multi-Objective Design Optimization of Hydraulic Components Using a Hierarchical Metamodel Assisted Evolutionary Algorithm. Part 2: Applications P. Grafenberger*, E. Parkinson**, H.A. Georgopoulou,
More informationThe Continuous Adjoint Method for the Computation of First- and Higher-Order Sensitivities
NATIONAL TECHNICAL UNIVERSITY OF ATHENS Parallel CFD & Optimization Unit Laboratory of Thermal Turbomachines The Continuous Adjoint Method for the Computation of First- and Higher-Order Sensitivities (Activities,
More informationAn Efficient Aerodynamic Optimization Method using a Genetic Algorithm and a Surrogate Model
6 th Australasian Fluid Mechanics Conference Crown Plaza, Gold Coast, Australia -7 December 7 An Efficient Aerodynamic Optimization Method using a Genetic Algorithm and a Surrogate Model A. Shahrokhi*,
More informationMultilevel Optimization Strategies Based on Metamodel Assisted Evolutionary Algorithms, for Computationally Expensive Problems
Multilevel Optimization Strategies Based on Metamodel Assisted Evolutionary Algorithms, for Computationally Expensive Problems I.C. Kampolis, A.S. Zymaris, V.G. Asouti, K.C. Giannakoglou Abstract In this
More informationSingle and multi-point aerodynamic optimizations of a supersonic transport aircraft using strategies involving adjoint equations and genetic algorithm
Single and multi-point aerodynamic optimizations of a supersonic transport aircraft using strategies involving adjoint equations and genetic algorithm Prepared by : G. Carrier (ONERA, Applied Aerodynamics/Civil
More informationGeometric Optimisation of a Jet Pump
Geometric Optimisation of a Jet Pump ASSIA HELALI, JEAN-LOUIS KUENY Laboratoire des Ecoulements Géophysiques et Industrielles Ecole Nationale Supérieure d Hydraulique et de Mécanique de Grenoble Institut
More informationEVOLUTIONARY AERODYNAMIC SHAPE OPTIMIZATION THROUGH THE RBF4AERO PLATFORM
ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering M. Papadrakakis, V. Papadopoulos, G. Stefanou, V. Plevris (eds.) Crete Island, Greece, 5 10 June
More informationDesign optimization method for Francis turbine
IOP Conference Series: Earth and Environmental Science OPEN ACCESS Design optimization method for Francis turbine To cite this article: H Kawajiri et al 2014 IOP Conf. Ser.: Earth Environ. Sci. 22 012026
More informationAERODYNAMIC SHAPE OPTIMIZATION UNDER FLOW UNCERTAINTIES USING NON-INTRUSIVE POLYNOMIAL CHAOS AND EVOLUTIONARY ALGORITHMS
UNCECOMP 2017 2 nd ECCOMAS Thematic Conference on Uncertainty Quantification in Computational Sciences and Engineering M. Papadrakakis, V. Papadopoulos, G. Stefanou (eds.) Rhodes Island, Greece, 15 17
More informationMETAMODEL-ASSISTED MULTI-OBJECTIVE EVOLUTIONARY OPTIMIZATION
Evolutionary and Deterministic Methods for Design, Optimization and Control with Applications to Industrial and Societal Problems EUROGEN 2005 R. Schilling, W.Haase, J. Periaux, H. Baier, G. Bugeda (Eds)
More informationEVOLUTIONARY ALGORITHMS WITH SURROGATE MODELING FOR COMPUTATIONALLY EXPENSIVE OPTIMIZATION PROBLEMS
ERCOFTAC 2006 Design Optimization International Conference, April 5-7 2006, Gran Canaria, Spain EVOLUTIONARY ALGORITHMS WITH SURROGATE MODELING FOR COMPUTATIONALLY EXPENSIVE OPTIMIZATION PROBLEMS Kyriakos
More informationAIRFOIL SHAPE OPTIMIZATION USING EVOLUTIONARY ALGORITHMS
AIRFOIL SHAPE OPTIMIZATION USING EVOLUTIONARY ALGORITHMS Emre Alpman Graduate Research Assistant Aerospace Engineering Department Pennstate University University Park, PA, 6802 Abstract A new methodology
More informationAUTOMATED AERODYNAMIC OPTIMIZATION SYSTEM FOR SST WING-BODY CONFIGURATION
AUTOMATED AERODYNAMIC OPTIMIZATION SYSTEM FOR SST WING-BODY CONFIGURATION Daisuke SASAKI *, Guowei YANG and Shigeru OBAYASHI Tohoku University, Sendai 98-8577, JAPAN AIAA-22-5549 Abstract In this paper,
More informationOPTIMIZATIONS OF AIRFOIL AND WING USING GENETIC ALGORITHM
ICAS22 CONGRESS OPTIMIZATIONS OF AIRFOIL AND WING USING GENETIC ALGORITHM F. Zhang, S. Chen and M. Khalid Institute for Aerospace Research (IAR) National Research Council (NRC) Ottawa, K1A R6, Ontario,
More informationAn Optimization Method Based On B-spline Shape Functions & the Knot Insertion Algorithm
An Optimization Method Based On B-spline Shape Functions & the Knot Insertion Algorithm P.A. Sherar, C.P. Thompson, B. Xu, B. Zhong Abstract A new method is presented to deal with shape optimization problems.
More informationComparison of Global Optimization Methods for Drag Reduction in the Automotive Industry
Comparison of Global Optimization Methods for Drag Reduction in the Automotive Industry Laurent Dumas 1, Vincent Herbert, and Frédérique Muyl 2 1 Laboratoire Jacques-Louis Lions, Université Pierre et Marie
More informationMulti-Disciplinary Optimization with Minamo
EXCELLENCE IN SIMULATION TECHNOLOGIES Multi-Disciplinary Optimization with Minamo Ingrid Lepot Numerical Methods and Optimization Group, Cenaero CESAR Training Workshop, Mar 18, 2009 Surrogate Based Optimization
More informationAirfoil Optimization by Evolution Strategies
013 IEEE Congress on Evolutionary Computation June 0-3, Cancún, México Airfoil Optimization by Evolution Strategies Drew A. Curriston Alice E. Smith Department of Aerospace Engineering Department of Industrial
More informationGAs for aerodynamic shape design II: multiobjective optimization and multi-criteria design
GAs for aerodynamic shape design II: multiobjective optimization and multi-criteria design D. Quagliarella, A. Vicini C.I.R.A., Centro Italiano Ricerche Aerospaziali Via Maiorise 8143 Capua (Italy) Abstract
More informationIMPROVEMENT IN PERFORMANCE PARAMETERS BY SHAPE OPTIMIZATION OF A CONICAL FLOW AROUND DIFFUSER
VI International Conference on Adaptive Modeling and Simulation ADMOS 2013 J. P. Moitinho de Almeida, P. D iez, C. Tiago and N. Pars (Eds) IMPROVEMENT IN PERFORMANCE PARAMETERS BY SHAPE OPTIMIZATION OF
More informationOptimization Design and Flow Analysis of Reversible Pump-Turbine
International Symposium on Current Research in Hydraulic Turbines April 04, 2017, Turbine Testing Lab, Kathmandu University, Dhulikhel, Nepal Optimization Design and Flow Analysis of Reversible Pump-Turbine
More informationOptimization of Laminar Wings for Pro-Green Aircrafts
Optimization of Laminar Wings for Pro-Green Aircrafts André Rafael Ferreira Matos Abstract This work falls within the scope of aerodynamic design of pro-green aircraft, where the use of wings with higher
More informationMulti-objective Optimization
Some introductory figures from : Deb Kalyanmoy, Multi-Objective Optimization using Evolutionary Algorithms, Wiley 2001 Multi-objective Optimization Implementation of Constrained GA Based on NSGA-II Optimization
More informationApplication of Jetstream to a Suite of Aerodynamic Shape Optimization Problems. Karla Telidetzki
Application of Jetstream to a Suite of Aerodynamic Shape Optimization Problems by Karla Telidetzki A thesis submitted in conformity with the requirements for the degree of Master of Applied Science Graduate
More informationAcceleration of Turbomachinery steady CFD Simulations on GPU
Acceleration of Turbomachinery steady CFD Simulations on GPU Mohamed H. Aissa 1,2 Dr. Tom Verstraete 1 Prof. Cornelis Vuik 2 1 Turbomachinery Department, Von Karman Institute, Belgium 2 Delft Institute
More informationConceptual Design and CFD
Conceptual Design and CFD W.H. Mason Department of and the Multidisciplinary Analysis and Design (MAD) Center for Advanced Vehicles Virginia Tech Blacksburg, VA Update from AIAA 98-2513 1 Things to think
More informationON THE USE OF SURROGATE EVALUATION MODELS IN MULTI-OBJECTIVE EVOLUTIONARY ALGORITHMS
European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2004 P. Neittaanmäki, T. Rossi, S. Korotov, E. Oñate, J. Périaux, and D. Knörzer (eds.) Jyväskylä, 24 28 July 2004
More informationAn Introduction to Evolutionary Algorithms
An Introduction to Evolutionary Algorithms Karthik Sindhya, PhD Postdoctoral Researcher Industrial Optimization Group Department of Mathematical Information Technology Karthik.sindhya@jyu.fi http://users.jyu.fi/~kasindhy/
More informationParameter based 3D Optimization of the TU Berlin TurboLab Stator with ANSYS optislang
presented at the 14th Weimar Optimization and Stochastic Days 2017 Source: www.dynardo.de/en/library Parameter based 3D Optimization of the TU Berlin TurboLab Stator with ANSYS optislang Benedikt Flurl
More informationAerodynamic Optimization Using a Parallel Asynchronous Evolutionary Algorithm Controlled by Strongly Interacting Demes
Aerodynamic Optimization Using a Parallel Asynchronous Evolutionary Algorithm Controlled by Strongly Interacting Demes Kyriakos C. Giannakoglou, Varvara G Asouti To cite this version: Kyriakos C. Giannakoglou,
More informationStudies of the Continuous and Discrete Adjoint Approaches to Viscous Automatic Aerodynamic Shape Optimization
Studies of the Continuous and Discrete Adjoint Approaches to Viscous Automatic Aerodynamic Shape Optimization Siva Nadarajah Antony Jameson Stanford University 15th AIAA Computational Fluid Dynamics Conference
More informationOptimization of an Axial Pump using CFturbo, PumpLinx & optislang
13th Annual Weimar Optimization and Stochastic Days 2016 Conference for CAE-based parametric optimization, stochastic analysis and Robust Design Optimization Optimization of an Axial Pump using CFturbo,
More informationTHREE-DIMENSIONAL INVERSE DESIGN OF AXIAL COMPRESSOR STATOR BLADE USING NEURAL-NETWORKS AND DIRECT NAVIER STOKES SOLVER
Inverse Problems in Engng, 200?, Vol. 00, No. 0, pp. 1 14 THREE-DIMENSIONAL INVERSE DESIGN OF AXIAL COMPRESSOR STATOR BLADE USING NEURAL-NETWORKS AND DIRECT NAVIER STOKES SOLVER A. GIASSI, V. PEDIRODA,
More informationSurrogate Models for Aerodynamic Performance Prediction
Surrogate Models for Aerodynamic Performance Prediction Christopher Smith Department of Computing Faculty of Engineering and Physical Sciences University of Surrey A thesis submitted for the degree of
More informationMATH 573 Advanced Scientific Computing
MATH 573 Advanced Scientific Computing Analysis of an Airfoil using Cubic Splines Ashley Wood Brian Song Ravindra Asitha What is Airfoil? - The cross-section of the wing, blade, or sail. 1. Thrust 2. Weight
More informationAIRCRAFT & CAR SHAPE OPTIMIZATION ON THE RBF4AERO PLATFORM
11th HSTAM International Congress on Mechanics Athens, 27 30 May, 2016, Greece AIRCRAFT & CAR SHAPE OPTIMIZATION ON THE RBF4AERO PLATFORM D.H. Kapsoulis 1, V.G. Asouti 1, E.M. Papoutsis-Kiachagias 1, K.C.
More informationTurbine Aerothermal Optimization Using Evolution Strategies. Drew A. Curriston
Turbine Aerothermal Optimization Using Evolution Strategies by Drew A. Curriston A thesis submitted to the Graduate Faculty of Auburn University in partial fulfillment of the requirements for the Degree
More informationADJOINT OPTIMIZATION OF 2D-AIRFOILS IN INCOMPRESSIBLE FLOWS
11th World Congress on Computational Mechanics (WCCM XI) 5th European Conference on Computational Mechanics (ECCM V) 6th European Conference on Computational Fluid Dynamics (ECFD VI) E. Oñate, J. Oliver
More informationERCODO2004_238. ERCOFTAC Design Optimization: Methods & Applications. Sequential Progressive Optimization Using Evolutionary and Gradient Algorithms
ERCOFTAC Design Optimization: Methods & Applications International Conference & Advanced Course Athens, Greece, March 31- April 2, 2004 Conference Proceedings Editors: K.C. Giannakoglou (NTUA), W. Haase
More informationModule 1 Lecture Notes 2. Optimization Problem and Model Formulation
Optimization Methods: Introduction and Basic concepts 1 Module 1 Lecture Notes 2 Optimization Problem and Model Formulation Introduction In the previous lecture we studied the evolution of optimization
More informationChallenges in Boundary- Layer Stability Analysis Based On Unstructured Grid Solutions
Challenges in Boundary- Layer Stability Analysis Based On Unstructured Grid Solutions Wei Liao National Institute of Aerospace, Hampton, Virginia Collaborators: Mujeeb R. Malik, Elizabeth M. Lee- Rausch,
More informationEnhancement of wind turbine aerodynamic performance by a numerical optimization technique
Journal of Mechanical Science and Technology 26 (2) (202) 455~462 www.springerlink.com/content/738-494x DOI 0.007/s2206-0-035-2 Enhancement of wind turbine aerodynamic performance by a numerical optimization
More informationMETA-MODELING FOR ROBUST DESIGN AND MULTI-LEVEL OPTIMIZATION
META-MODELING FOR ROBUST DESIGN AND MULTI-LEVEL OPTIMIZATION R. Duvigneau and Praveen C. Opale project-team, INRIA Sophia Antipolis (France) Regis.Duvigneau@sophia.inria.fr Praveen.Chandrashekarappa@sophia.inria.fr
More informationUncertainty Analysis: Parameter Estimation. Jackie P. Hallberg Coastal and Hydraulics Laboratory Engineer Research and Development Center
Uncertainty Analysis: Parameter Estimation Jackie P. Hallberg Coastal and Hydraulics Laboratory Engineer Research and Development Center Outline ADH Optimization Techniques Parameter space Observation
More informationVerification and Validation of Turbulent Flow around a Clark-Y Airfoil
Verification and Validation of Turbulent Flow around a Clark-Y Airfoil 1. Purpose 58:160 Intermediate Mechanics of Fluids CFD LAB 2 By Tao Xing and Fred Stern IIHR-Hydroscience & Engineering The University
More informationAxisymmetric Viscous Flow Modeling for Meridional Flow Calculation in Aerodynamic Design of Half-Ducted Blade Rows
Memoirs of the Faculty of Engineering, Kyushu University, Vol.67, No.4, December 2007 Axisymmetric Viscous Flow Modeling for Meridional Flow alculation in Aerodynamic Design of Half-Ducted Blade Rows by
More informationAn Approach to automatically optimize the Hydraulic performance of Blade System for Hydraulic Machines using Multi-objective Genetic Algorithm
IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS An Approach to automatically optimize the Hydraulic performance of Blade System for Hydraulic Machines using Multi-objective Genetic
More informationAerofoil Optimisation Using CST Parameterisation in SU2
Aerofoil Optimisation Using CST Parameterisation in SU2 Marques, S., & Hewitt, P. (2014). Aerofoil Optimisation Using CST Parameterisation in SU2. Paper presented at Royal Aeronautical Society Applied
More informationLecture 1 GENERAL INTRODUCTION: HISTORICAL BACKGROUND AND SPECTRUM OF APPLICATIONS
Lecture 1 GENERAL INTRODUCTION: HISTORICAL BACKGROUND AND SPECTRUM OF APPLICATIONS 1.1 INTRODUCTION Analysis of physical problems in any area of engineering and science involves a multipronged approach:
More informationMULTI-OBJECTIVE OPTIMISATION IN MODEFRONTIER FOR AERONAUTIC APPLICATIONS
EVOLUTIONARY METHODS FOR DESIGN, OPTIMIZATION AND CONTROL P. Neittaanmäki, J. Périaux and T. Tuovinen (Eds.) CIMNE, Barcelona, Spain 2007 MULTI-OBJECTIVE OPTIMISATION IN MODEFRONTIER FOR AERONAUTIC APPLICATIONS
More informationNumerical optimization of the guide vanes of a biradial self-rectifying air turbine.
Numerical optimization of the guide vanes of a biradial self-rectifying air turbine. André Ramos Maduro email: andre.maduro@ist.utl.pt Instituto Superior Técnico, University of Lisbon,Av. Rovisco Pais,1049-001
More informationOpenVSP: Parametric Geometry for Conceptual Aircraft Design. Rob McDonald, Ph.D. Associate Professor, Cal Poly
OpenVSP: Parametric Geometry for Conceptual Aircraft Design Rob McDonald, Ph.D. Associate Professor, Cal Poly 1 Vehicle Sketch Pad (VSP) Rapid parametric geometry for design NASA developed & trusted tool
More informationUnstructured 3-D Grid Partitioning Methods Based On Genetic Algorithms
Unstructured 3-D Grid Partitioning Methods Based On Genetic Algorithms K.C. Giannakoglou and A.P. Giotis 1 Abstract. In this paper, two methods that are capable to efficiently partition 3-D unstructured
More informationShape optimisation using breakthrough technologies
Shape optimisation using breakthrough technologies Compiled by Mike Slack Ansys Technical Services 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary Introduction Shape optimisation technologies
More informationStrömningslära Fluid Dynamics. Computer laboratories using COMSOL v4.4
UMEÅ UNIVERSITY Department of Physics Claude Dion Olexii Iukhymenko May 15, 2015 Strömningslära Fluid Dynamics (5FY144) Computer laboratories using COMSOL v4.4!! Report requirements Computer labs must
More informationScuola Politecnica DIME
Scuola Politecnica DIME Ingegneria Meccanica - Energia e Aeronautica Anno scolastico 2017-2018 Fluidodinamica Avanzata Aircraft S-shaped duct geometry optimization Professor Jan Pralits Supervisor Joel
More informationAdjoint-based Pareto Front Tracing in Aerodynamic Shape Optimization
Tenth International Conference on Computational Fluid Dynamics (ICCFD10), Barcelona,Spain, July 9-13, 2018 ICCFD10-2018-322 Adjoint-based Pareto Front Tracing in Aerodynamic Shape Optimization K. Gkaragkounis,
More informationMulti-objective optimization of transonic airfoils using variable-fidelity models, co-kriging surrogates, and design space reduction
Graduate Theses and Dissertations Iowa State University Capstones, Theses and Dissertations 2016 Multi-objective optimization of transonic airfoils using variable-fidelity models, co-kriging surrogates,
More informationDesign Optimization of a Subsonic Diffuser. for a Supersonic Aircraft
Chapter 5 Design Optimization of a Subsonic Diffuser for a Supersonic Aircraft 5. Introduction The subsonic diffuser is part of the engine nacelle leading the subsonic flow from the intake to the turbo-fan
More informationHeuristic Optimisation
Heuristic Optimisation Part 10: Genetic Algorithm Basics Sándor Zoltán Németh http://web.mat.bham.ac.uk/s.z.nemeth s.nemeth@bham.ac.uk University of Birmingham S Z Németh (s.nemeth@bham.ac.uk) Heuristic
More informationOutline. CS 6776 Evolutionary Computation. Numerical Optimization. Fitness Function. ,x 2. ) = x 2 1. , x , 5.0 x 1.
Outline CS 6776 Evolutionary Computation January 21, 2014 Problem modeling includes representation design and Fitness Function definition. Fitness function: Unconstrained optimization/modeling Constrained
More informationNUMERICAL ANALYSIS OF CENTRIFUGAL PUMP IMPELLER FOR PERFORMANCE IMPROVEMENT
Int. J. Chem. Sci.: 14(2), 2016, 1148-1156 ISSN 0972-768X www.sadgurupublications.com NUMERICAL ANALYSIS OF CENTRIFUGAL PUMP IMPELLER FOR PERFORMANCE IMPROVEMENT S. KALIAPPAN, M. D. RAJKAMAL and D. BALAMURALI
More informationDESIGN OPTIMIZATION OF HELICOPTER BLADE USING CLASS SHAPE FUNCTION BASED GEOMETRY REPRESENTATION
DESIGN OPIMIZAION OF HELICOPER BLADE USING CLASS SHAPE FUNCION BASED GEOMERY REPRESENAION Atthaphon Ariyarit*, Masahiko Sugiura**, Yasutada anabe**, and Masahiro Kanazaki* *Department of Aerospace Engineering,
More informationAerospace Applications of Optimization under Uncertainty
Aerospace Applications of Optimization under Uncertainty Sharon Padula, Clyde Gumbert, and Wu Li NASA Langley Research Center Abstract The Multidisciplinary Optimization (MDO) Branch at NASA Langley Research
More informationState of the art at DLR in solving aerodynamic shape optimization problems using the discrete viscous adjoint method
DLR - German Aerospace Center State of the art at DLR in solving aerodynamic shape optimization problems using the discrete viscous adjoint method J. Brezillon, C. Ilic, M. Abu-Zurayk, F. Ma, M. Widhalm
More informationDrag and Lift Validation of Wing Profiles
Drag and Lift Validation of Wing Profiles STAR European Conference 2010 London By: Dr Martin van Staden Aerotherm Computational Dynamics 14th IAHR Conference December 2009 Outline of Presentation Background
More informationAdjoint Solver Workshop
Adjoint Solver Workshop Why is an Adjoint Solver useful? Design and manufacture for better performance: e.g. airfoil, combustor, rotor blade, ducts, body shape, etc. by optimising a certain characteristic
More informationOptimum Aerodynamic Design of Centrifugal Compressor using a Genetic Algorithm and an Inverse Method based on Meridional Viscous Flow Analysis
Optimum Aerodynamic Design of Centrifugal Compressor using a Genetic Algorithm and an Inverse Method based on Meridional Viscous Flow Analysis Sasuga Itou *, Nobuhito Oka 2, Masato Furukawa, Kazutoyo Yamada,
More informationMcNair Scholars Research Journal
McNair Scholars Research Journal Volume 2 Article 1 2015 Benchmarking of Computational Models against Experimental Data for Velocity Profile Effects on CFD Analysis of Adiabatic Film-Cooling Effectiveness
More informationFinding Tradeoffs by Using Multiobjective Optimization Algorithms
Finding Tradeoffs by Using Multiobjective Optimization Algorithms Shigeru Obayashi, Daisuke Sasaki,* Akira Oyama** Institute of Fluid Science, Tohoku University, Sendai, 98-8577, Japan *Present address,
More informationCommercial Implementations of Optimization Software and its Application to Fluid Dynamics Problems
Commercial Implementations of Optimization Software and its Application to Fluid Dynamics Problems Szymon Buhajczuk, M.A.Sc SimuTech Group Toronto Fields Institute Optimization Seminar December 6, 2011
More informationData-Driven Evolutionary Optimization of Complex Systems: Big vs Small Data
Data-Driven Evolutionary Optimization of Complex Systems: Big vs Small Data Yaochu Jin Head, Nature Inspired Computing and Engineering (NICE) Department of Computer Science, University of Surrey, United
More informationDETERMINING PARETO OPTIMAL CONTROLLER PARAMETER SETS OF AIRCRAFT CONTROL SYSTEMS USING GENETIC ALGORITHM
DETERMINING PARETO OPTIMAL CONTROLLER PARAMETER SETS OF AIRCRAFT CONTROL SYSTEMS USING GENETIC ALGORITHM Can ÖZDEMİR and Ayşe KAHVECİOĞLU School of Civil Aviation Anadolu University 2647 Eskişehir TURKEY
More informationSimulation of Turbulent Flow over the Ahmed Body
Simulation of Turbulent Flow over the Ahmed Body 58:160 Intermediate Mechanics of Fluids CFD LAB 4 By Timur K. Dogan, Michael Conger, Maysam Mousaviraad, and Fred Stern IIHR-Hydroscience & Engineering
More informationAIR LOAD CALCULATION FOR ISTANBUL TECHNICAL UNIVERSITY (ITU), LIGHT COMMERCIAL HELICOPTER (LCH) DESIGN ABSTRACT
AIR LOAD CALCULATION FOR ISTANBUL TECHNICAL UNIVERSITY (ITU), LIGHT COMMERCIAL HELICOPTER (LCH) DESIGN Adeel Khalid *, Daniel P. Schrage + School of Aerospace Engineering, Georgia Institute of Technology
More informationHigh-order solutions of transitional flow over the SD7003 airfoil using compact finite-differencing and filtering
High-order solutions of transitional flow over the SD7003 airfoil using compact finite-differencing and filtering Daniel J. Garmann and Miguel R. Visbal Air Force Research Laboratory, Wright-Patterson
More informationInfluence of the tape number on the optimized structural performance of locally reinforced composite structures
Proceedings of the 7th GACM Colloquium on Computational Mechanics for Young Scientists from Academia and Industry October 11-13, 2017 in Stuttgart, Germany Influence of the tape number on the optimized
More informationParametric design of a Francis turbine runner by means of a three-dimensional inverse design method
IOP Conference Series: Earth and Environmental Science Parametric design of a Francis turbine runner by means of a three-dimensional inverse design method To cite this article: K Daneshkah and M Zangeneh
More informationDEVELOPMENT OF HIGH SPECIFIC SPEED FRANCIS TURBINE FOR LOW HEAD HPP
Engineering MECHANICS, Vol. 20, 2013, No. 2, p. 139 148 139 DEVELOPMENT OF HIGH SPECIFIC SPEED FRANCIS TURBINE FOR LOW HEAD HPP JiříObrovský*, Hana Krausová*, Jiří Špidla*, Josef Zouhar* Nowadays we can
More informationComparison of B-spline Surface and Free-form. Deformation Geometry Control for Aerodynamic. Optimization
Comparison of B-spline Surface and Free-form Deformation Geometry Control for Aerodynamic Optimization Christopher Lee,DavidKoo and David W. Zingg Institute for Aerospace Studies, University of Toronto
More informationAirfoil Shape Optimization Using Output-Based Adapted Meshes
AIAA AVIATION Forum 5-9 June 2017, Denver, Colorado 23rd AIAA Computational Fluid Dynamics Conference AIAA 2017-3102 Airfoil Shape Optimization Using Output-Based Adapted Meshes Guodong Chen and Krzysztof
More informationAn Evolutionary Strategies Method to Optimize Turbine and Compressor Blades. Noel Cervantes
An Evolutionary Strategies Method to Optimize Turbine and Compressor Blades by Noel Cervantes A thesis submitted to the Graduate Faculty of Auburn University in partial fulfillment of the requirements
More informationHigh-Fidelity Simulation of Unsteady Flow Problems using a 3rd Order Hybrid MUSCL/CD scheme. A. West & D. Caraeni
High-Fidelity Simulation of Unsteady Flow Problems using a 3rd Order Hybrid MUSCL/CD scheme ECCOMAS, June 6 th -11 th 2016, Crete Island, Greece A. West & D. Caraeni Outline Industrial Motivation Numerical
More informationComposite Materials Multi Objective Optimization using ANSA, META and modefrontier
Composite Materials Multi Objective Optimization using ANSA, META and modefrontier Introduction As the composite materials market expands and more applications appear in the automotive, aerospace and naval
More informationHydrodynamic performance enhancement of a mixed-flow pump
IOP Conference Series: Earth and Environmental Science Hydrodynamic performance enhancement of a mixed-flow pump To cite this article: J H Kim and K Y Kim 202 IOP Conf. Ser.: Earth Environ. Sci. 5 02006
More informationHigh-Lift Aerodynamics: STAR-CCM+ Applied to AIAA HiLiftWS1 D. Snyder
High-Lift Aerodynamics: STAR-CCM+ Applied to AIAA HiLiftWS1 D. Snyder Aerospace Application Areas Aerodynamics Subsonic through Hypersonic Aeroacoustics Store release & weapons bay analysis High lift devices
More informationTurbulence Modeling. Gilles Eggenspieler, Ph.D. Senior Product Manager
Turbulence Modeling Gilles Eggenspieler, Ph.D. Senior Product Manager 1 Overview The Role of Steady State (RANS) Turbulence Modeling Overview of Reynolds-Averaged Navier Stokes (RANS) Modeling Capabilities
More informationReducing Fitness Evaluations Using Clustering Techniques and Neural Network Ensembles
Reducing Evaluations Using Clustering Techniques and Neural Network Ensembles Yaochu Jin and Bernhard Sendhoff Honda Research Institute Europe Carl-Legien-Str. 30 63073 Offenbach/Main, Germany yaochu.jin@honda-ri.de
More informationMulti-objective optimization of blade profiles for a horizontal axis tidal turbine
IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Multi-objective optimization of blade profiles for a horizontal axis tidal turbine To cite this article: B Huang et al 2018 IOP
More informationIntroduction to Aerodynamic Shape Optimization
Introduction to Aerodynamic Shape Optimization 1. Aircraft Process 2. Aircraft Methods a. Inverse Surface Methods b. Inverse Field Methods c. Numerical Optimization Methods Aircraft Process Conceptual
More informationMulti-objective adjoint optimization of flow in duct and pipe networks
Multi-objective adjoint optimization of flow in duct and pipe networks Eugene de Villiers Thomas Schumacher 6th OPENFOAM Workshop PennState University, USA 13-16 June, 2011 info@engys.eu Tel: +44 (0)20
More informationOptimization in MATLAB Seth DeLand
Optimization in MATLAB Seth DeLand 4 The MathWorks, Inc. Topics Intro Using gradient-based solvers Optimization in Comp. Finance toolboxes Global optimization Speeding up your optimizations Optimization
More informationVisualization of Global Trade-offs in Aerodynamic Problems by ARMOGAs
Visualization of Global Trade-offs in Aerodynamic Problems by ARMOGAs Daisuke Sasaki 1, and Shigeru Obayashi 2 1 School of Engineering, University of Southampton, Highfield, Southampton, SO17 3SP, United
More informationCFD-1. Introduction: What is CFD? T. J. Craft. Msc CFD-1. CFD: Computational Fluid Dynamics
School of Mechanical Aerospace and Civil Engineering CFD-1 T. J. Craft George Begg Building, C41 Msc CFD-1 Reading: J. Ferziger, M. Peric, Computational Methods for Fluid Dynamics H.K. Versteeg, W. Malalasekara,
More informationAdvanced Aerodynamic Optimization System for Turbomachinery
Advanced Aerodynamic Optimization System for Turbomachinery Bo Chen 1 e-mail: b-chen04@mails.tsinghua.edu.cn Xin Yuan Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,
More informationInverse Design of an Indoor Environment by Using a CFD-based Adjoint Method with Adaptive Step Size for Adjusting Design Parameters
Zhao, X., Liu, W., Liu, S., Zou, Y., and Chen, Q. 2017. Inverse design of an indoor environment by using a CFD-based adjoint method with adaptive step size for adjusting design parameter Numerical Heat
More informationInfluence of mesh quality and density on numerical calculation of heat exchanger with undulation in herringbone pattern
Influence of mesh quality and density on numerical calculation of heat exchanger with undulation in herringbone pattern Václav Dvořák, Jan Novosád Abstract Research of devices for heat recovery is currently
More informationMulti-Objective Optimization of Transonic Compressor Blade Using Evolutionary Algorithm
JOURNAL OF PROPULSION AND POWER Vol. 21, No. 6, November December 2005 Multi-Objective Optimization of Transonic Compressor Blade Using Evolutionary Algorithm Yongsheng Lian University of Michigan, Ann
More information