锥导乘波机的构型设计与性能研究

以圆锥绕流流场为基础,运用锥导理论生成了不同的乘波机构型,并对乘波机进行了包括升力、粘性阻力、波阻、升阻比、乘波机长度、体积、容积效率等各主要性能指标在内的性能计算,初步确定出了锥导乘波机性能的变化规律及其决定性定型参数。计算结果表明:锥导乘波机构成方法简单且具有较高的升阻比和反设计性能,源流场圆锥半锥角、乘波机上表面型线曲率半径是影响锥导乘波机性能的决定性定型参数。     

Robust design and analysis of a conformal expansion nozzle with inverse-design idea

This paper examines robust optimization design and analysis of a conformal expansion nozzle of flying wing Unmanned Aerial Vehicle(UAV) with the inverse-design idea.In view of flow features and stealth constraints, the inverse-design idea is described and the uncertainty-based robust design model is presented.A robust design system employs this model to combine deterministic optimization and robust optimization and is applied into design of a conformal expansion nozzle.The results indicate that design optimization can conform to the anticipation of the inversedesign idea and significantly improve the aerodynamic performance that meet the requirement of 6σ.The present method is a feasible nozzle design strategy that integrates robust optimization and inverse-design.