摘要
首先以高超声速钝楔绕流热流计算和Ｍ∞＝２０、激波角θ＝３２５８°的平板激波附面层干扰分离流动计算，研究了迎风ＴＶＤ格式的粘性特性，发现即使在很小的物面网格下，原有格式计算驻点热流仍较实验和文献结果低，激波附面层干扰的分离区小于实验值，原因主要在于熵修正公式。针对这些不足提出了新的熵修正公式，用改进后的格式重新计算，得到了与实验符合较好的结果。最后用改进的格式对分离流动的壁面温度控制效应进行了研究。
Firstly, from the calculations of the heating rate on a blunt body in hypersonic flow and separation of shock/boundary layer interac tion flow, the capability of upwind TVD scheme for computing viscous flows is st udied. It is found that the computed heating rate and separated region are lower than the experimental data. The problem is the entropy correction formula. Then a new entropy correction formula is proposed, and the agreeable results compare d with experiment are obtained. Secondly, using modified scheme, the study of co ntrol of separated flow over a smooth surface by body wall temperature is comple ted. The results show that the change of wall temperature can control the locati on of separation point and separation region effectively.
出处
《计算物理》
CSCD
北大核心
1999年第4期401-408,共8页
Chinese Journal of Computational Physics
基金
国家自然科学基金
