中文摘要：

利用紧耦合计算方法对高超声速二维圆柱绕流问题进行了计算,验证了计算结果的准确性.分析指出了高超声速飞行器常用刚性或柔性陶瓷瓦类热防护结构具有导热系数小、毕渥数Bi大于100的瞬态热响应特性,提出了忽略气体与固体间耦合效应,假设固体表面温度时时与流体温度保持一致,进而可以按第一类边界条件求解热防护结构内瞬态热响应问题的非耦合计算方法.与刚性陶瓷瓦二维圆管结构紧耦合瞬态热响应计算结果对比研究表明,该方法可以较好地给出该类热防护结构瞬态热响应及非稳态温度分布,满足其厚度设计及气动热预测等实际工程需求,且计算时间仅为紧耦合方法的1/6,具有很好的工程应用价值.

英文摘要：

Through the analysis of properties of unsteady thermal response of ceramic thermal protection structure：Low thermal conductivity and Bi＞100,the coupling effect between air and solid is assumed to be ignored.Besides,the surface temperature of solid is considered to be the same with the fluid temperature,and then according to these conditions,an uncoupled approach is brought forward to solve the unsteady thermal response of structure by using the first kind boundary condition.Compared with the results of tight coupled method for the problem of a two-dimensional cylinder with hypersonic flow,this new uncoupled approach not only has high accuracy in the results of thermal response and temperature distribution,but also saves much computing time and meets the practical demand for the design of structure thickness and prediction of aerodynamic heating,which show this method has a great value in the engineering application.