TILTAERO. Tilt Rotor Interactional Aerodynamics. Antonio Saporiti. AgustaWestland Cascina Costa (Italy) TILT ROTOR INTERACTIONAL AERODYNAMICS

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1 TILTAERO Tilt Rotor Interactional Aerodynamics Antonio Saporiti AgustaWestland Cascina Costa (Italy) TILTAERO 1

2 TILTAERO Framework Program Competitive and Sustainable Growth Purpose Investigation of aerodynamic interactional phenomena on Tilt-Rotor Field Aerodynamics E.C. Contract 4GRD CT TILTAERO 2

3 TILTAERO Objectives Validation and improvement of analytical tools Assessment of experimental data base Acquire fundamental knowledge in the field TILTAERO 3

4 TILTAERO Consortium CIRA, DLR, NLR, ONERA NTUA Agusta, Eurocopter, Eurocopter-D, IAI, Westland TILTAERO 4

5 TILTAERO Working Structure CFD Model Design ERICA Configuration Wind Tunnel Tests TILTAERO 5

6 TILTAERO Working Structure COMPUTATIONAL METHODOLOGIES Flight mechanics codes Unsteady panel methods Euler solvers Navier-Stokes solvers To validate the methodologies in the prediction of Tilt Rotor Aerodynamics Interactions TILTAERO 6

7 TILTAERO Working Structure Feasibility study of a full span powered model 1/5 Mach Scale ERICA Configuration Forces and moments Pressures Complete envelope MODEL DESIGN Design and manufacturing of an half-span powered model 1/2.5 Mach Scale ERICA Configuration Forces and moments Pressures Noise CFD data base TILTAERO 7

8 TILTAERO Working Structure WIND TUNNEL TESTS Half-span powered model 1/2.5 Mach Scale Forces and moments Pressures Noise CFD data base DNW-LLF facility TILTAERO 8

9 COMPUTATIONAL METHODOLOGIES Unsteady panel method Body panels: 2690 Blade panels: 40 x 16 / blade Azimuthal step: 5º TILTAERO 9

10 COMPUTATIONAL METHODOLOGIES Navier-Stokes multiblock + actuator disk Fixed wing grid nodes 8 blocks Tiltable wing grid nodes 8 blocks Nacelle grid nodes 22 blocks WT Support nodes 10 blocks Actuator disk grid nodes 4 blocks Total nodes 52 blocks TILTAERO 10

11 COMPUTATIONAL METHODOLOGIES 2nd order time accurate Navier-Stokes Computational parameters Chimera+Cartesian background grid Central difference plus artificial dissipation Two-equation Wilcox k- w model TILTAERO 11

12 MODEL DESIGN Full Span model Model Feasibility Study Internal balances Pressure transducers Rotors controls Remotely setting of moveable components Aircraft mode & conversion set-up TILTAERO 12

13 MODEL DESIGN Full Span model Model Feasibility Study Helicopter mode & descent flight set-up TILTAERO 13

14 MODEL DESIGN Half-span model Model Design and Manufacturing 3 Internal balances 90 blade unsteady pressures 51 wing unsteady pressures 248 wing steady pressures Overall external balance Rotor controls Remotely control of moveable parts TILTAERO 14

15 WIND TUNNEL TESTS Rotor performances Blade pressures distribution Wings efficiency Wing airloads Half-span model (1/2.5 Mach scaled of ERICA) Noise measurements: strong link with ADYN program (UE funded project) TILTAERO 15

16 WIND TUNNEL TESTS DNW LLF Set-up TILTAERO 16

17 WIND TUNNEL TESTS TILTAERO 17

18 WIND TUNNEL TESTS TILTAERO 18

19 LINKS with other CTP s ADYN project Advanced European Tiltrotor DYnamics and Noise GRD Noise: TILTAERO half-span model (two set of blades) High speed test: TILTAERO blades will be tested at Modane S1 MA (end of 2006) Whirl flutter test: TILTAERO half-span model with new wings (dinamically scaled) will be tested at DNW (beginning 2007) TILTAERO 19