Hypersonic vehicle aerodynamic design using modified sequential approximate optimization |
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Authors: | Wen-jie Wang Ze-ping Wu Dong-hui Wang Wei-hua Zhang Kun Zhao Patrick N Okolo Gareth J Bennett |
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Institution: | 1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China;2. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Centre, Mianyang, Sichuan 621000, People’s Republic of China;3. Department of Mechanical and Manufacturing Engineering, Trinity College Dublin, The University of Dublin, D02 PN40, Ireland |
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Abstract: | Hypersonic vehicles are receiving increased attention within the aerospace community due to their high cruise speed and long-range capabilities. In this paper, a modified Sequential Approximate Optimization method is proposed for an optimized aerodynamic design of a hypersonic vehicle. As part of this approach, a constrained experimental design method is developed to handle the constraints more efficiently. A radial basis function is used to surrogate time-consuming CFD analysis. An efficient and more robust numerical mesh morphing scheme for the hypersonic vehicle is developed for the generation of high-quality meshes. Within this paper, a novel adaptive infilling strategy is proposed which uses an inaccurate search technique coupled with an elite archive. This allows the location of a more promising sample region and hence improves the surrogate accuracy, thereby further enhancing the optimization efficiency. A hypersonic vehicle aerodynamic design problem is solved using the proposed approach and satisfactory results are obtained at much lower computational costs. The lift-to-drag ratio is increased by 23.8% when compared with the base configuration while also satisfying the volume and lift constraints. The pressure and Mach contours have been compared with those of the base configuration and the results demonstrate the strength of the optimized configuration. The modified sequential approximate optimization for designing an improved hypersonic vehicle is worth referencing in future work. |
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Keywords: | Hypersonic vehicle Aerodynamic optimization Sequential approximate optimization Constrained experimental design Mesh morphing Inaccurate search Adaptive infilling strategy |
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