二维与三维激波强干扰的流动结构与热流放大问题研究

项目名称： 二维与三维激波强干扰的流动结构与热流放大问题研究

项目编号： No.11302116

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 王晓欣

作者单位： 清华大学

项目金额： 26万元

中文摘要： 激波干扰是高超声速空气动力学中重要且复杂的问题。激波干扰产生的流场结构引起干扰点处热流显著放大，尤其是弱激波与强激波形成的强干扰，热流放大问题非常突出。第四类激波干扰属于二维强干扰，存在IV类与IVa两种干扰形式，引发的热流放大存在差异。目前的研究结果尚未对两种形式给出系统的理论分析。本项目通过理论与数值计算相结合的方法，获得两种形式干扰的临界条件与热流放大系数预测方法。斜激波与钝舵前缘激波的干扰是高超声速飞行器中非常典型的激波干扰形式，属于三维强干扰，目前对于该问题的研究结果非常有限。本项目将通过对二维第四类激波干扰理论进行三维修正，用来分析三维激波干扰对称面流场结构及热流峰值。本项目的研究结果将为高超声速飞行器中典型的二维与三维激波干扰问题提供合理的分析预测方法，为飞行器结构设计与优化提供重要依据。

中文关键词： 激波干扰；第IV类干扰；热流峰值；高超声速；

英文摘要： Shock interference is one of the most critical and challenging problem in hypersonic flow. Shock interferences lead to complicated flow structures and raise the heating rate in the area of impingement. The heating amplification is especially notable for those strong interactions generated by an oblique shock wave impinging on a strong shock wave. Type IV interaction is a kind of strong two-dimensional interference, which can be classified into two patterns, namely Type IV and Type IVa. The two types differ in both the flow structure and the heating rate. There are only few researches on the two types and almost no theoretical work has been done. The critical condition for the two types and their heat transfer distribution will be studied in the current project. The interaction brought by a plane oblique shock wave impinging on the bowl shock in front of a blunt fin is a kind of typical three-dimensional strong shock interference. However, only limited studies have been made on this important problem, which is incapable of solving practical problems in hypersonic vehicles. In this project, we will make some modifications on the two-dimensional shock interference theory and apply it to the symmetric plane of interaction, in order to identify the flow pattern of this particular kind of three-dimensional interferenc

英文关键词： shock wave ineraction；type IV interaction；peak heating；hypersonic；