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底部分离流是气体动力学中的重要研究课题之一,底部流在工程应用上主要是计算底部压力及底部热流,提供流场结构的定性以至定量的描述,由于底部流场本身的复杂性,实验研究,特别是在高超声速范围内的实验数据还不够多,理论分析方法也不够完善,尤其是底部传热的研究远远不及底部压力的研究,这是因为在底部流场结构不太清楚的情况下,受热过程不容易得到合理的处理,一些半经验的方法均有很大的局限性,
Bottom flow separation is one of the important research topics in gas dynamics. The bottom flow is mainly used to calculate the bottom pressure and the bottom heat flow in engineering applications, providing a qualitative and quantitative description of the flow field structure. Due to the complexity of the bottom flow field itself, Experimental research, especially in the hypersonic range of experimental data is not enough, the theoretical analysis is not perfect enough, especially the study of bottom heat transfer is far less than the bottom of the pressure, because the bottom of the flow field structure is not clear Of the case, the heating process is not easy to get a reasonable treatment, some of the semi-empirical methods have great limitations,