高超声速含灰气体流动中热传递过程研究

In the framework of two-fluid model for gas-particle flows, the general formulation in curvilinear coordinates is given for the problem of dusty-gas supersonic flows over a blunt body and the similarity criteria are derived for the flow and heat transfer processes of the two phases. Suitable numerical modeling and solution method are considered in the different cases where the free-stream Reynolds number is moderate or high. Especially, a novel Lagrangian method is developed to calculate the dispersed-phase parameters. The theoretical analysis and numerical simulation reveal that the existence of particles may result in the enhancement of heat transfer to the wall of the blunt body. The obtained results provide a basis to the applications in various field such as aerospace, aviation, chemical and energy engineering.

本项目通过对高超声速条件下含灰气体绕流与物体界面相互作用的分析，发展描述激波层与边界层两个不同区域流动的数学模型，给出近壁区气固两相流动结构，揭示壁面热流增强的新机制，确定中高雷诺数流动中粒子无惯性沉积机制适用的边界和控制两相边界层中热传递过程的相似准则，为计算高速飞行钝头体的热流通量和摩擦系数提供理论依据。