供料量对离心机中心区域流场影响的DSMC模拟

为研究离心机中心区域流动状况,采用了直接模拟Monte-Carlo方法(DSMC)对其进行模拟。离心机参数来自于Iguassu模型,在轴对称条件下,计算区域的径向两个边界是旋转壁面,在轴向两个边界上是根据刚体平衡解设定的气体入流。通过模拟计算,验证了在稀薄气体条件下,离心机内气体旋转运动的热力学平衡状态是等温刚体运动。比较了在相同供料量不同供料速度情况下的离心机内流场,结果表明:离心机内最高温度和径向最大速度和供料速度有关,而供料量对离心机轴向速度分布有着很大影响。

DSMC simulation of the feed influence on a gas centrifuge flow field

The direct simulation Monte-Carlo method(DSMC) was used to investigate the flow fields in the central regions of a gas centrifuge,using parameters taken from the Iguassu model centrifuge.The two boundaries in the radial direction of the computational region were the rotating walls,with the two external boundaries in the axial direction being the inflows calculated from the rigid body equilibrium solution.The simulations show that the isothermal solid rotation was the thermal equilibrium state in the gas cen...