Program: Advanced Certificate Program

Transcription

1 Program: Advanced Certificate Program Course: CFD-Vehicle Aerodynamics Directorate of Training and Lifelong Learning #470-P, Peenya Industrial Area, 4th Phase Peenya, Bengaluru

2 Introduction Aerodynamic characteristics of ground vehicles have more pronounced effect on acceleration, speed, fuel efficiency and handling. Numerical and experimental techniques are used for accurate predictions and understanding the flow behavior. Computational vehicle aerodynamics are time-dependent simulations used for the improvement of vehicle properties by flow control or aerodynamic shape. Hence, CFD-Vehicle Aerodynamics helps in evaluating the feasibility of new design. Through the use of CATIA for geometric modelling, ICEMCFD for grid generation and FLUENT for analysis, several industry specific problems can be solved. This course empowers the students to carry out independent analysis related to vehicle aerodynamics. Course Aims At the end of this course, student will be able to 1. Create geometric models for the vehicle aerodynamics problems 2. Create CFD models and solve different aerodynamics problems 3. Proficiently use Ansys ICEM CFD and Ansys FLUENT software for modeling, solving and post processing 4. Analyze industry specific problems for imposing appropriate grid types, boundary conditions, solver setting to arrive at converged CFD results. Who should attend? Engineering Graduates and Postgraduates from Mechanical and Automobile Engineering

3 Structure of the course: Sl. No. Module Code Module Title Theory (hrs) Lab (hrs) Project (hrs) Duration (Wks) 1 AAE107 Geometric modelling 2 AAE108 Basic Computational Fluid Dynamics AAE109 Computational Vehicle Aerodynamics Total Number of Theory hrs. 60 Total Number of (Lab+ Project) hrs. 300 Total course duration hrs. 360

4 Module Information Module Code Course Module Title AAE107 CFD- Vehicle Aerodynamics Geometric Modelling Theory: Overview of CAD and applications, Solid Modeling: Wireframe, B-Rep, CSG approaches, transformations and Projections, Mathematical representation of curves and surfaces, Use three- dimensional CAD techniques to generate wire frame, surface models, and solid models. Laboratory: Introduction to modelling software environment, the study of industrial drawings, preparing sketches. Creating part and surface modelling: Difference between surface and solid models, methods of solids model construction and editing, creating patterns, draft, shells, etc., creating surfaces, advanced surfaces with the use of variation sweep, surface by boundary and curves, editing surfaces. Assembly of parts: Introduction to assemblies, creating assemblies, assembly constraints, managing assemblies, animation in assemblies. Introduction to engineering drafting, managing views, adding dimensions and annotations, creating bill of materials. Module Resources: a. Module notes- Module notes in PPT form b. Recommended books 1. Zeid I., (2005), Mastering CAD/CAM, McGraw Hill ISBN c. Software Tools CATIA d. Hardware Tools Nil e. Other Resources(if any required)

5 Module Information Module Code Course Module Title AAE108 CFD- Vehicle Aerodynamics Basic Computational Fluid Dynamics Theory: Introduction: Introduction to CFD, Conservation equation; mass; momentum and energy equations; Classification into various types of equation- parabolic elliptic and hyperbolic; Physical examples of elliptic, parabolic and hyperbolic partial differential equations; boundary and initial conditions; overview of numerical methods. Numerical Grid Generation: Numerical grid generation; types of grid, Basic grid Types Shapes, application. Finite Difference Technique: Finite difference methods; different means for formulating finite difference equation; Taylor series expansion, integration over element; treatment of boundary conditions; boundary layer treatment; variable property; accuracy of finite difference method. Finite Volume Technique: Finite volume methods; different types of finite volume grids; approximation of surface and volume integrals; Diffusion problems; central and upwind formulations and comparison for convection-diffusion problem. Laboratory: Ansys ICEM CFD: Introduction to ICEM CFD, geometry creation, CAD/CAE data exchange and geometry cleanup, cleanup tools, edge-face meshing and mesh quality, volume meshing, mesh control through size functions and boundary layer, volume decomposition examples. Ansys Fluent: Basics of Fluent for CFD analysis, solver basics and setting, boundary conditions, heat transfer, turbulence modelling, post processing techniques (Contours, vectors, streamline and animation), surface creations, and export of results. Exercises based flow over a cylinder, an aerofoil, turbulent flow in nozzle and diffuser, natural convection in cavities, flow through heat exchanger, external aerodynamic flow.

6 Module Resources: a. Module notes- Module notes in PPT form b. Recommended books 1. Batchelor, G. K. (2000) An Introduction to Fluid Dynamics, Cambridge University Press, New Delhi. 2. Tannehill, J. C., Anderson, D. A., and Pletcher, R. H. (1997) Computational Fluid Mechanics Heat Transfer, Taylor & Francis c. Software Tools Ansys ICEMCFD Ansys Fluent d. Hardware Tools Nil e. Other Resources(if any required)

7 Module Information Module Code Course Module Title AAE109 CFD- Vehicle Aerodynamics Computational Vehicle Aerodynamics Theory: Navier-Stokes Equations: Explicit and implicit methods; SIMPLE type methods; Turbulence and modeling: Important features of turbulent flow, Reynolds averaged Navier-Stokes equations, RANS modeling, DNS and LES, Comparison of Different Turbulence Models. Introduction to Vehicle Aerodynamics: Basics of aerodynamics- Concept of bluff body, Generic shapes, Relevance of these shapes to ground vehicles, Pressure drag and Viscous drag; flow phenomenon related to vehicles- external and internal flow problem, resistance to vehicle motion, performance potential of vehicle aerodynamics; air flow to passenger compartment; Aerodynamic Drag of Cars: Cars as a bluff body, flow field around car, drag force, types of drag force, analysis of aerodynamic drag, drag coefficient of cars, strategies for aerodynamic development, low drag profiles. Laboratory: Ansys ICEM CFD: Meshing exercises on automotive related components- Ahmed body, various car shapes, passenger compartment, engine cabin. Ansys Fluent: External and internal airflow in a passenger car, heat transfer analysis- conductive and convective heat transfer, drag reduction in commercial vehicles.

8 Module Resources: a. Module notes- Module notes in PPT form b. Recommended books 1. Hucho W. H. (1998) Aerodynamics of Road Vehicles, 4th edition, SAE International 2. Tannehill, J. C., Anderson, D. A., and Pletcher, R. H. (1997) Computational Fluid Mechanics Heat Transfer, Taylor & Francis c. Software Tools Ansys ICEMCFD Ansys Fluent d. Hardware Tools Nil e. Other Resources(if any required)