来流条件对热流组分扩散项影响效应分析

使用数值模拟的方法研究了高超声速热化学非平衡流动中不同来流条件对热流组分扩散项的影响。以RAM-CII飞行试验外形为例,使用AUSM+-up格式耦合LU-SGS方法求解带化学反应源项的多组分NS方程。得到如下结论:在非平衡热环境数值模拟研究中,完全催化壁时组分扩散项热流所占比率表征了壁面催化效应的强弱;在同一高度下,随着马赫数升高热流组分扩散项比例越来越显著,而马赫数相同时,随着高度增高热流组分扩散项所占比例越来越小,主要原因在于当地化学反应进行程度不同。

Flow configuration effects on mass diffusion part of heat-flux in thermal-chemical flows

Relationship between flow conditions and mass diffusion heat-flux of hypersonic thermo-chemical non-equilibrium flows is researched in this article with numerical simulation method.The simulations follow the RAM-CII flight case configurations,including AUSM+-up scheme and LU-SGS method.The results show that,mass diffusion part heat-flux represents the difference of surface catalytic condition,the ratio of mass diffusion part increases when the Mach number increases at the same height and it decreases when t...