飞翼布局气动方案优选和试验验证

Optimization and experimental verification for aerodynamic scheme of flying-wing

提出综合考虑飞翼布局隐身性能和气动性能的平面形状特征参数,分析了方案优选中的约束关系.采用参数化方法构建了三维曲面模型,并将物面网格划分流程进行自动化封装,通过更改设计参数准确快速地得到新方案的物面网格.应用基于Euler方程的数值方法进行布局方案的气动性能计算分析,在重点方案的分析中加入黏性修正;应用高频近似方法估算方案的隐身性能.以巡航状态作为设计点,在隐身性能的约束下,应用分析-修正的方法完成了气动布局方案优选,并对最终选定的方案进行风洞试验验证,证明该方案有进一步研究的价值.

The characteristic arguments to describe the plane shape considering the stealthy and aerody- namic performance of the flying-wing was proposed, the constraint relation in the scheme optimization was ana- lyzed. The 3-dimensional curved surface model was built by using parameterization method, and the process to divide the surface grids was packaged automatically. The new surface grids can be generated accurately and rapidly by changing the design arguments, thus the iteration efficiency in the scheme optimization process was improved. The aerodynamic performance was calculated by using the numerical method based on the Euler e- quation, the viscous correction was added in the analysis of the major scheme. The stealthy performance was estimated by using the high-frequency approximate method. The cruise status was taken as the design point to optimize the aerodynamic scheme considering the constraints of stealthy performance based on analysis-modifi- cation method, and the selected scheme was tested by the wind tunnel. The results prove the research deserv- ing the selected scheme.