This paper describes a numerical simulation of an unsteady axisymmetric flow in a shock tube, which arises as a strong shock wave incident on the end face of the tube is reflected under conditions in which a chain of shock waves is formed after the reflected shock wave, similar to a pseudo-jump in steady flows. The conditions under which this flow is formed are understudied. The flow is investigated in the case of the shock tube in which an incident shock wave is formed and moving at a velocity corresponding to the Mach number M = 2.6. The numerical calculation is carried out using the Reynolds-averaged Navier-Stokes equations and the SST-( k - ω ) model of turbulence. The resulting data are compared with the known experimental data and the results of numerical calculations.

中文翻译：

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激波管中的不稳定伪跳跃

本文描述了激波管中非定常轴对称流动的数值模拟，当入射到管端面的强激波在反射激波后形成一串激波的条件下被反射时产生，类似于稳定流中的伪跳跃。形成这种流动的条件尚未得到充分研究。在激波管的情况下研究流动，其中形成入射激波并以对应于马赫数 M = 2.6 的速度移动。数值计算是使用雷诺平均 Navier-Stokes 方程和湍流的 SST-( k - ω ) 模型进行的。所得数据与已知实验数据和数值计算结果进行比较。