高超声速气动力/热/结构多场耦合分析

Aerodynamic/Thermal/Structural Coupling Analysis of Hypersonic Flight Vehicles

针对高超声速飞行器的气动力/热/结构多场耦合问题,根据各物理场的特征时间尺度与相互影响关系确定多场耦合计算策略,提出了适于工程应用的分析流程,并对不同物理场之间的数据交换方法进行分析,建立了耦合热弹性变形的流场数值模拟方法。以典型的高速全动舵面为例进行了多场耦合分析,分析结果表明,气动加热效应对结构弹性变形以及由此带来的气动力的变化非常显著。气动力/热/结构多场耦合的研究对于准确预测飞行性能、保障飞行安全性具有重要意义。

With regard to aerodynamic/thermal/structural coupling study of hypersonic flight vehicles,a practical engineering analysis flow is presented based on the investigation of characteristic time scale and mutual influence relation for different physical fields. Furthermore,the interpolation method and the simulation method for aerodynamic computation coupling with aerothermoelastic deformation are presented.Taking a supersonic all-movable rudder as a numerical example,the results show that the influence of aerodynamic heating is an innegligible factor for structural deformation and aerodynamic force. The coupling analysis is significant to flight performance forecast and security.