三维流场乘波体快速设计方法及多目标优化  

Rapid Design and Multi-Object Optimization for Waverider from 3D Flow

作　　者：刘传振[1] 白鹏[1] 陈冰雁[1] 纪楚群[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100072

出　　处：《宇航学报》2016年第5期535-543,共9页Journal of Astronautics

摘　　要：为扩大乘波体的设计空间,精确地计算设计流场,引入高超声速激波装配法,结合基于多重网格的搜索技术加速寻点效率,扩展流线追踪方法到三流流场,建立普适于一般三维流场的乘波体快速设计方法。对设计曲线使用B样条方法建模并提取设计变量,结合改进的Pareto遗传算法对升阻比和容积率进行多目标优化设计,获得了性能较高的乘波外形。研究表明此方法效率高,设计空间大,是一种乘波体设计的新方法和新思路。To overcome the disadvantages of the traditional design methods for waverider, the shock fitting method is introduced to calculate the three dimensional hypersonic flow and to capture shock wave precisely. The point-searching method based on multi-grid is also explored to expedite the efficiency of streamline tracing. Therefore, the rapid design method is built for 3D waverider. Then the Pareto optimization of L/D ratio and plot ratio are studied based on B-spline and genetic algorithms to improve the aerodynamic performance. The study shows that the method is of high efficiency and large design space that can be applied in novel waverider design.

关 键 词：乘波体 激波装配法 多重搜索 Pareto遗传算法 B样条 

分 类 号：TP731[自动化与计算机技术—检测技术与自动化装置]