1 University of Sydney L. F. González E. J. Whitney K. Srinivas ADVENT Aim : To Develop advanced numerical tools and apply them to optimisation problems.

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Presentation transcript:

1 University of Sydney L. F. González E. J. Whitney K. Srinivas ADVENT Aim : To Develop advanced numerical tools and apply them to optimisation problems in aeronautics. ADVanced EvolutioN Team Dassault Aviation- Pole-Scientifique Jacques Périaux

2 Three Element Aerofoil Euler Reconstruction. Problem Definition: qRebuild from scratch the pressure distributions that approximately fit the target pressure distributions of a three element aerofoil set. qFlow Conditions - Euler Flow, Mach 0.2, Angle of Attack 17 deg qThe flap and slat can move 30 deg CW or CCW and +/ in x, y directions qThe fitness function is the point by point pressure difference:

3 qFlow is treated as two dimensional, viscous and is calculated using B. Mohammadi code NSC2ke qThe solver uses unstructured mesh which are generated using bamg.[ref] qThe computations stop when the 2-norm of the residual falls below a prescribed limit, in this case CFD Solver B Mohammadi "Fluid dynamics computation with NSC2KE : an user-guide : release 1.0", INRIA (Natl Inst Res Comp & Ctl Sci, France), 94.

4 Implementation Population size: 405 Grid nbv 2500 Single Population EA (EA SP) Hierarchical Asynchronous Parallel EA (HAPEA) Population size: 40 Viscous: Grid nbv 2500 Viscous: Grid nbv 2000 Viscous: Grid nbv 1500

5 Results. Pressure Distribution

6 Results. Candidate and Target Geometries

7 Results: Example of Convergence. Mesh Adaptation : Mesh 15

8 Mach Comparison besttarget

9 Pressure Comparison besttarget

10 Results Function Evaluations

11 Results Function Evaluations

12 Results Function Evaluations

13 Results….. Movie Search

14 Work in Progress ….Three Element Aerofoil Navier – Stokes Mesh Adaptation Flow Conditions q - Adaptive unstructured mesh generator q - Navier-Stokes Flow q - Reynolds Number: 14,000,000 q - Mach 0.2 q - Angle of Attack: 10 deg

15 Results Mesh Adaptation : Mesh 0

16 Results 2 Mesh Adaptation : Mesh 8

17 Results 3 Mesh Adaptation : Mesh 15

18 Three Element Aerofoil Reconstruction Mesh Adaptation : Mesh 15

19 Results….. Movie Adaptation