高超声速飞行器转捩特性及表面特征研究

摘要

高超声速飞行器飞行时，会出现转捩问题，其对飞行器力/热特性和飞行器的设计均有显著影响。本文采用数值和工程方法相结合，对高超声速飞行器迎风面的转捩情况进行预测，同时对飞行器表面粗糙度和表面缺陷对转捩特性的影响进行研究。本文得到了飞行器飞行的转捩高度，同时，获得了转捩特性与表面粗糙度、表面缺陷的相关关系，对该类飞行器的设计有一定借鉴意义。%Transition may happen during the flight of hypersonic vehicle, which have great effect on the aerodynamic property and design of vehicle. Transition on the windward surface of a hypersonic vehicle using numeric and engineering method is predicted. Research on the roughness and the disfigurement of the surface is also carried on. The flying height where transition happens of the vehicle is predicted, the result also shows the relation between transition and characteristic of the surface.