气体离心机二维供料射流流场的数值模拟

2D numerical study of the feed jet flow field in a gas centrifuge

为研究气体离心机供料射流的流动状况,采用数值求解二维Navier-Stokes方程组的方法对其进行了模拟,计算得到了不同供料角度下的流场分布。结果表明,供料射流对离心机流场在径向和轴向上的分布都有影响;供料角度为0°时,气体在轴向上反复膨胀、压缩,形成膨胀波和激波,对径向的影响较小;供料角度为45°和90°时,射流对轴向的影响减弱,对径向流动的影响显著增强。由计算结果可知,离心机环流的计算中应当对供料条件进行修正。

The feed jet flow field in a gas centrifuge was numerically simulated by solving the 2D Navier-Stokes equations using the finite volume method with a second order implicit upwind scheme, The feedjet flow distributions for different feed angles indicate that the flow field in the gas centrifuge is axial directions. A feed angle of influenced in both the radial and 0° resulted in an axial expansion wave and a shock wave, while the influence of the feed jet on the radial flow becomes more important for feed angle changes of 45° to 90°. Thus, the feed conditions can be modified to study the counter-current flow in centrifuge.