有限单元法作为解析场问题的有效手段,在流体力学问题中得到了越来越广泛的应用。在利用它解决水力机械中的水力计算问题时,由于有限单元法本身的高度几何灵活性,以及作为计算依据的是流体力学的具有普遍意义的基础方程,它表现了相当大的通用性。特別是能使一些边界条件复杂、以前难于处理的问题,变得象一般问题一样容易求解。双列叶栅流体动力学问题的求解就是一例,本文给出这一问题的讨论。 As an effective method to solve the field problem, the finite element method has been more and more widely used in the fluid mechanics. When it was used to solve hydraulic computational problems in hydraulic machines, it showed considerable versatility due to the high degree of geometric flexibility of the finite element method itself, and the computationally based underlying universal equation of fluid mechanics. In particular, the problems that can make some boundary conditions complicated and difficult to deal with before become as easy to solve as general problems. The solution of the double row cascade fluid dynamics problem is an example. This article gives a discussion of this problem.