水力机械转轮中全三维势流的非线性混合边界元法

Three-Dimensional Nonlinear Mixed Boundary Element Solution for Potential Flow in Hydraulic Machinery

为求解水力机械(水轮机,水泵等)转轮中的全三维势流流动,本文提出了一种有效的计算方法,文中计入了转轮流场的一些实际特性,如叶片不均匀负荷,叶片出口的旋涡流动等。由于采用了非线性混合边界元,故本文所提出的方法精度高,简单易行,计算量小,可以较广泛地适用于偏离设计工况的运行情况,算例结果同实验值吻合很好。

In the pre'sent paper, a fully three'-dimensional numerical method for potential flow through an impeller using nonlinear boundary element method is proposed. Some practical features of the flow such as nonuniform loading on blades, existence of vortex sheets at the trailing edges etc were considered. A nonlinear mixed boundary element method is used here. And this method can be easily extended to off design conditions. The calculated results agreed very well with experimental data.