基于Kriging模型的高超声速舵面优化设计

采用RANS方程进行了高超声速舵面的气动特性计算与平面形状优化设计研究。为了提高优化效率,采用拉丁超立方抽样试验设计方法得到样本点,并建立Kriging模型替代费时的流动数值模拟。以最大化舵面操纵力矩和最小化平面面积为目标,以阻力不增为约束条件,进行了舵面平面形状优化设计。优化结果表明,优化舵面的平面面积减少了4.78%,力矩绝对值在设计点增加了24.69%,且在较大的攻角范围均有提高。将初始舵面和优化舵面分别装配到方形截面导弹上,验证计算表明,优化舵面的操纵效率更高。

Optimization Design of Hypersonic Control Surface Based on Kriging Model

Based on RANS solver,an optimization method using Kriging surrogate model for designing the hypersonic control surface planform is developed.The optimization is accomplished with the drag being not increased as a constraint and with the maximum of the absolute moment and the minimization of the planform area as an objective function.The results show that,compared with the baseline control surface,the absolute moment is increased by 24.69%,and the planform area is reduced by 4.78%.Besides,the absolute moment is higher than that of the baseline control surface at different angles of attack.With the baseline and optimal control surfaces being fitted to the body of a square cross-section missile respectively,the higher control efficiency of optimal control surface is achieved.