Comparison of two design methods of aerodynamic biobjectives for airfoil and wing shapes
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A simplified adaptive wing, which deflects its leading edge and trailing edge flaps to vary its shape, is calculated to investigate the potential aerodynamic gains and compared with a biobjective optimization (BO) wing in the present paper. In subsonic-transonic flights the deflection angle of a flap is determined through optimization using a deterministic method. In supersonic flight the flaps are not deflected due to the requirement of having a minimum drag. For comparison the aerodynamic characteristics of a BO airfoil and wing is calculated. A parallel genetic algorithm is used in BO. Euler equations served as governing equations in flow field calculation. Numerical results in both 2D (airfoil) and 3D (wing) cases show that aerodynamic performances of the two design airfoils and wings are much better than those of the original ones, with the adaptive design one the best.
Keywordssimplified adaptive wing biobjective optimization airfoil and wing design
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- 4.Obayashi, S., Kawahara, K., LU factorization of an implicit scheme for the compressible N-S equations, AIAA, 84–1670.Google Scholar
- 5.Yu, R. X., Zhu Ziqiang, Transfinite interpolation grid generation with the application of B spline, J. Peking University of Aeronautics and Astronautics (in Chinese), 2003, 29(1): 27–30.Google Scholar
- 7.Hager, J. O., Eyi, S., Lee, K. D., Multi-point design of transonic airfoils using optimization, AIAA, 92: 4225.Google Scholar
- 8.Schmitt, V., Charpin, F., Pressure distribution on the ONERA M6 wing at transonic Mach number, AGARD Advisory Report 138, 1979.Google Scholar