１引言在水轮机和水泵水轮机领域中使用数值解析，始于２０世纪７０年代初的准三元解析法．当时的计算机技术和计算机的运算能力虽然同今天无法相提并论，但对水泵扬程等的预测已能达到相当的精度．现在普遍被称为数值流体解析的方法，即将流道分割为数十万乃至数百万个网格、 1 Introduction Numerical analysis is used in the field of turbines and pump turbines, starting with quasi-ternary analysis in the early 1970s. At that time, although the computing power of computer technology and computer can not be compared with today, the prediction of the pump head and so on has reached considerable accuracy. Now commonly known as numerical fluid analysis method, the flow channel is divided into hundreds of thousands or even millions of grid,