带贫料端挡板的离心机的流场及分离性能的研究

从线性化的Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程组出发，采用有限差分的数值计算方法，研究带贫料端挡板的离心机内的流动特性。并在流场计算结果的基础上，用改进的径向平均法求解丰度方程，用复合形法对流动参数进行优化选择并对带贫料端挡板的离心机的分离性能进行了计算。带挡板后流动图象很复杂，挡板会使机械驱动和下盖驱动效应明显减弱，但能改善流型效率。优化选择后，带贫粒端挡板的离心机能使分离效率明显提高。

Flow field and separative performance of gas centrifuge with waste baffle

To investigate the flow field inside a gas centrifuge with a waste baffle, linearized Navier Stokes equations are numerically solved by a finite difference method. Based on the numerical solutions of flow field, an extended radially averaged method is applied to the evaluation of isotope concentration. The driving parameters are optimized and the separative performances of the gas centrifuge with and without waste baffle are examined. The flow pattern is rather complex in a centrifuge with baffle. The waste baffle has increased the profile efficiency but weakened the effects of the mechanical drive and thermal drive on the bottom cap. By optimizing the driving parameters, the separative power can be improved obviously in comparison to the centrifuge without a waste baffle.