In this thesis , adopting compressible navier - stokes equations and compressible k - - e turbulence double model , studied 2d viscous flow field in wet turbine ' s separate - stage . coordinate transformation is made for the navier - stokes equations by using body fitted coordinate system , moreover , the flow field in 2d cascade is calculated by using the well - established simple method 本文采用可压缩气体的n - s方程，并采用可压缩的-湍流双方程模型，研究了饱和汽轮机分离级内二维粘性叶栅流场，采用贴体坐标系对n - s方程进行了坐标变化，并利用成熟的simple算法对二维叶栅内的流场进行了计算。
