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本文用欧拉方程计算了楔形角为40°,M_s=4.62双马赫反射的流场,计算采用了矢通量分裂和 TVD 两种格式,并考虑了γ=1.4和高温平衡气体两种情况。流场的密度场测量采用双曝光全息、M-Z、差分三种干涉技术。壁面密度分布的计算与测量结果比较表明:三种干涉方法测量结果差别不大,都处在γ=1.4和平衡气体的计算结果范围内。
In this paper, the Euler equation was used to calculate the flow field with 40 ° wedge angle and M_s = 4.62 double Mach number. The vector flux splitting and TVD were used in the calculation. Two cases of γ = 1.4 and high temperature equilibrium gas were considered. The density field of the flow field is measured by double exposure holography, M-Z and differential three interference technologies. The comparison between the calculation of wall density distribution and the measurement results shows that the measurement results of the three interference methods are not significantly different and are all within the range of γ = 1.4 and the calculation results of the equilibrium gas.