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。
Because the equation of shallow water and the equation of inviscid compressible flow have completely similar mathematical forms , a lot of mathematical concepts and methods - including the numerical simulation method of aerodynamics can be used in the research of the shallow wave 由于数学上浅水长波方程与可压缩气体的无粘性流方程类似,可以把浅水长波方程比拟成可压缩气体无粘性流方程,将空气动力学中所得到的许多数学概念和方法(包括数值方法)直接应用于浅水长波的运动。