The current demands for three dimensions viscous flow in turbo machinery are more and more treated . this thesis presents a computational study of the flow field generated in a centrifugal fan and how that flow field changes through the downstream stator vane 叶轮机械内全三维粘性流的计算越来越受到国内外学者的重视,是当前国际范围内流体机械研究中的一个十分活跃的领域之一。