吸气式高超声速飞行器三维后体尾喷管优化设计

3D afterbody nozzle optimization of air-breathing hypersonic vehicle

三维后体尾喷管是吸气式高超声速飞行器产生推力、升力的关键部件,需要精细设计,最大限度地提升三维膨胀过程中的气动特性。本文在二维后体尾喷管优化设计的基础上,发展了一种三维后体尾喷管的优化设计方法。通过参数化建模、三维喷管计算网格自动生成、空间推进CFD解算器及NSGA-II多目标优化软件等技术手段,对后体尾喷管三维构型进行了多目标优化设计。优化后的三维后体尾喷管与原始喷管相比,推力和升力都得到了较大提升。

3D after-body nozzle of air-breathing hypersonic vehicle is a main part for generating thrust and lift. It needs careful design to maximum aerodynamic expansion characteristic. Based on 2D after-body nozzle optimization method, a 3D after-body nozzle optimization method is developed. Combining parameterized shape generating, 3D nozzle computation grid auto-generation, matured 3D space-marching CFD solver and NSGAII multi-objects optimization techniques, 3D nozzle configuration is optimized in multi-objectiv...