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基于分步遗传算法的车身气动优化

, PP. 1578-1582

Keywords: 流体力学,遗传算法,气动优化,低阻车身,风洞试验

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Abstract:

把车身气动优化分为3个阶段:二维车身阶段进行全局搜索;三维无轮车身和带轮整车阶段进行局部逼近;最后根据二维和三维算例的差异针对各阶段制定相应的进化策略。由于车轮的存在使车身气动规律发生变化,为了进一步提高优化效果,本文优化方法将固定位置的车轮作为约束条件之一。采用本文优化方法得到的低阻形体中,凸头车型和凹头车型的带轮整车优化结果的风阻系数CD值分别为0.129和0.124。同时,缩比模型的风洞试验也验证了该优化方法的可靠性。

References

[1]  Gardner B A, Selig M S. Airfoil design using a genetic algorithm and an inverse method[C]∥AIAA Paper, 2003-0043.
[2]  Doorly D J, Peiro J. Supervised parallel genetic algorithms in aerodynamic optimisation[C]∥Artificial Neural Nets and Genetic Algorithms, Vienna, 1998: 229-233.
[3]  Skea A F, Bullen P R, Qiao J, et al. CFD simulations and experimental measurements of the flow over a rotating wheel in a wheel arch[J]. SAE Technical Paper, 2001-01-0487.
[4]  Elofsson P, Bannister M. Drag reduction mechanisms due to moving ground and wheel rotation in passenger cars[J]. SAE Technical Paper, 2002-01-0531.
[5]  何忆斌,谷正气 ,李伟平,等. 汽车理想气动形体数字化模型构建及气动性能试验[J]. 航空动力学报,2011, 25(6): 1031-1035. He Yi-bin, Gu Zheng-qi, Li Wei-ping, et al. Design of aerodynamic optimization shape digital model for car and it' s wind tunnel test[J]. Journal of Aerospace Power, 2011, 25(6): 1031-1035.
[6]  Buchheim R, Deutenbach K R, Lückoff H J. Necessity and premises for reducing the aerodynamic drag of future passenger cars[C]∥SAE Paper, 810185, 1981.

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