混流式水轮机蜗壳内流动的数值研究  

Numerical Modelling and Study of Internal Flows through the Spiral Case in Francis Turbine

作　　者：廖伟丽[1] 李建中[1] 

机构地区：[1]西安理工大学,陕西西安710048

出　　处：《大电机技术》2002年第2期54-58,共5页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金资助项目 (59879023)

摘　　要：在分析研究现有的混流式水轮机蜗壳设计理论的基础上 ,对蜗壳在不同工况下的内部流动情况进行了三维不可压定常粘性流动的数值模拟。文中基于N_S方程 ,标准的k_ε模型 ,采用贴体坐标和非结构化网格 ,用SIMPLE算法对蜗壳内部流动进行了详细的计算分析 ,计算结果与试验值吻合 ,为蜗壳优化提供了依据 。This paper presents that numerical simulation of internal flows through the spiral case.Numerical simulation Model of the three-dimensional viscous flow in casing and stay vanes is based on the solution of Navier-Stokes equations with the standard model of turbulance k _ ε. The body_fitted curvilinear coordinate and the SIMPLE algorithm is adopted. The governing equation are discretizated hit no_staggered grid by means of finite volume mothed. In this paper the results of investigation are compared to experimented results. The analysis can be used to imprive and optumize the design of sprial casing stay vane and wicket gates.

关 键 词：流动特性 数值分析 混流式水轮机 蜗壳 内流动 

分 类 号：TK733.1[交通运输工程—轮机工程]