摘要
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。
Double Mach Reflection flow over wedge model in a shocktube at M_s,=4.62 and wedge andge θ_w=40°condition were calculatedby solving the Euler equation with improved J.Y.Yang's TVD schemeand Steger-Warming's flux-split scheme,considering the high temper-ature equilibrium air effects.And at the sametime,for making a com-parison with the experiment,the first trip point angle and density fieldwere also quantitatively measured by 3 kinds of interferometries(M-Z,Holograph,differential).Results comparison between calcula-tion and experiment indicate that the measured data are between thetwo lines being the numerical calculaiton of γ=1.4 and high tempera-ture equilibrium air.
关键词
激波
激波反射
激波管流动
shock tube flow
shock reflection
Euler equation
difference scheme
