Aerodynamic Optimization for Hypersonic Wing Design Based on Local Piston Theory

Aerodynamic Optimization for Hypersonic Wing Design Based on Local Piston Theory
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基于局部活塞理论的高超声速机翼设计气动优化

DOI:
10.2514/1.c033381
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发表时间:
2016-02
影响因子:
2.2
通讯作者:
叶正寅等
叶正寅等
中科院分区:
工程技术3区
文献类型:
--
作者:
张庆;叶正寅等

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用数值方法优化气动外形一直是工程界关注的问题。提出了一种基于局部活塞理论的高超声速机翼气动优化设计方法。优化的目标是在满足结构要求的前提下,改善NACA 0012生成的原始翼型或机翼的气动特性。在优化过程中,采用遗传算法进行优化搜索,Hicks-Henne凸点函数用于翼型的几何修改,和局部活塞理论用于从基线的几何修改引起的非定常压力扰动。由于超声速或高超声速条件下的非定常压力扰动可以根据最优搜索过程中的初始流场结果用局部活塞理论计算,因此只需要一个定常解,而不需要使用任何移动或变形网格。因此,本文所述的优化方法...
Optimization of aerodynamic shapes using numerical methods has always been of engineering interest. This paper presents a highly efficient aerodynamic optimization method for hypersonic wings based on local piston theory. The objective of the optimization is to improve the aerodynamic characteristics of original airfoils or wings generated from NACA0012 while satisfying constraints on structure requirements. In the optimization procedure, a genetic algorithm is employed for optimum search, the Hicks–Henne bump function is used for airfoil geometrical modification, and local piston theory is used for unsteady pressure perturbations caused by geometrical modification from the baseline. Because unsteady pressure perturbations at supersonic or hypersonic conditions could be calculated by local piston theory based on initial flowfield results in the optimum searching process, only one steady-state solution without any use of moving or deforming grids is required. Therefore, the optimization method described in...
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