An axisymmetric viscous shock tube simulation code is developed that keeps the shock and the contact discontinuity stationary in suitably constructed moving frames of reference. The flowfield around the discontinuities is represented on fine grids that move with the frames attached to the waves. These moving grids are overset upon a coarse background grid of the entire facility, allowing efficient computation of the main discontinuities as they traverse the tube. Focus is placed upon accurate capture of the influence of wave speeds and viscous effects upon the shock and contact discontinuity as they traverse the tube. The code is extensively validated against experiments ranging from Mach 1.6 to 2.7 in a 26.8-mm-diameter shock tube with argon driver/driven gases and an initial pressure of 66.66 Pa. Agreement within 2% is seen in velocity throughout the tube’s length. Test times are predicted to within 6% across a broad range of test conditions. Unsteady diaphragm opening effects as well as turbulent transition are demonstrated to substantially influence experimental results of the well-known experiments of Duff (“Shock-Tube Performance at Low Initial Pressure,” Physics of Fluids, Vol. 2, No. 2, 1959, pp. 207–216).

开发了轴对称粘性减震管仿真代码，该代码可在适当构造的移动参考框架中使震动和接触不连续性保持固定。不连续周围的流场以细格表示，细格随附在波浪上的框架移动。这些移动的网格在整个设备的粗略背景网格上被覆盖，从而可以有效地计算穿越管道的主要不连续点。重点放在精确捕获波速和粘性效应对冲击和接触不连续点在管道中的影响时所产生的影响。该代码已在直径26.8毫米，带有氩气驱动器/驱动气体且初始压力为66.66 Pa的冲击管中，针对1.6至2.7马赫的实验进行了广泛验证。整个管子的速度在2％以内是一致的。在广泛的测试条件下，预计测试时间将在6％之内。不稳定的隔膜打开效果以及湍流过渡被证明会大大影响Duff的著名实验的实验结果（“低初始压力下的冲击管性能，”流体物理学，Vol。2，第2号，1959年，第207-216页）。