激波诱导两相流中影响阻力系数的特性参数研究

基于双流体模型 ,利用Euler Lagrange组合方法 ,对激波诱导的气固两相流场进行了数值计算 ,系统研究了影响颗粒群阻力系数的几个重要特性参数。结果表明 :目前采用激波管技术研究非定常条件下颗粒群阻力系数时界定这些因素的影响程度是必要的。

Study on Drag-Related Properties of Two-Phase Flows Induced by Shock Waves

Based on the two-fluid model,prop erties of two-phase flows induced by shock waves were numerically investigated by using the Eulerian-Lagrangian method.When an incident shock wave propagates into a dusty gas,a transmitted shock wave experiences attenuation and the interf ace of the particle suspension accelerates.Four key parameters,i.e.Knudsen numbe r Kn,acceleration factor A,relative Mach number Ma r and Reynolds number Re,are calculated during the unsteady process.The results indicate t hat these four parameters play an important role in determining the dr ag coefficient if a shock tube is employed to measure the drag coefficient for p articles in a cloud under unsteady condition.