论文部分内容阅读
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。
The influence of different flow conditions on the diffusion of heat flow components in hypersonic thermo-chemical non-equilibrium flow was studied by numerical simulation. Taking the shape of the RAM-CII flight test as an example, the multi-component NS equations with chemical reaction source terms are solved using the AUSM + -up format coupled LU-SGS method. The conclusions are as follows: In the numerical simulation of non-equilibrium thermal environment, the proportion of heat flux in the complete catalysis wall indicates the catalytic effect of the wall. At the same height, with the Mach number increasing, Item ratio becomes more and more significant. When the Mach numbers are the same, the proportion of diffusion components of the heat flow components becomes smaller and smaller as the height increases, mainly due to the different degrees of local chemical reactions.