混流式水轮机转轮内部流动的准三元有限元解

A Quasi-three-Dimensional Finite Element Solution for Internal Flows of Mixed Flow Type Hydro-Turbine Runners

本文介绍了用有限元法进行水力机械转轮内部流动的准三元计算方法。推导了对水力机械更为适用的S_1和S_2流面的普遍方程。对一高比转速混流式水轮机转轮,进行了包括上冠和下环在内的5个S_1流面的计算,用S_1流面的解构造一个中心S_2流面进行迭代求解。给出了详细的计算结果。

A quasi-three-dimensional finite element solution is presented for internal flow applicable to all types of hydro-machine runners. The general equations of S1, and S2 streamsurfaces, in a form more suitable for the hydro-machinery, are derived. Calculation were performed for five S1 streamsurfaces including crown and shroud for a certain high specific speed mixed flow type hydroturbine runner. Their solution were used to construct a mean S2 streamsurface. An iterative method was used to find the quasi-three-dimension solution. Detailed and reasonable results are presented.