论文部分内容阅读
对HLLE+格式进行了讨论,并将其应用于高超声速热化学非平衡反应流场的数值模拟。本文控制方程为带化学反应源项的多组元轴对称Navier-Stokes方程,为了保证数值模拟的精确度,空间分裂采用基于结构网格的有限体积迎风格式HLLE+方法,时间推进为隐式的LU-SGS方法。化学反应模型采用经典的Dunn-Kang反应模型,并且采用Park的双温模型模拟流场的热力学非平衡效应。对高超声速条件下的RAM-CII模型进行了数值模拟,得到了与实验以及文献相符合的结果,验证了对HLLE+格式扩展的正确性。
The HLLE + format was discussed and applied to the numerical simulation of hypersonic thermo-chemical non-equilibrium reaction flow field. In order to ensure the accuracy of numerical simulation, the space-splitting method adopts finite volume upwind-style HLLE + method based on structured grid, and the time advance is implicit LU -SGS method. The chemical reaction model uses the classical Dunn-Kang reaction model and uses Park’s bi-temperature model to simulate the thermodynamic non-equilibrium effect of the flow field. The RAM-CII model under hypersonic conditions was numerically simulated, and the experimental results and the literature were obtained. The correctness of the extended HLLE + format was verified.