混流式原型水轮机的三维湍流计算  

Three dimensional simulation for turbulent flow through Francis archetype turbine

作　　者：刘宇[1] 吴玉林[1] 张梁[1] 刘树红[1] 戴先俊 初日亭 

机构地区：[1]清华大学热能工程系,北京100084 [2]龙滩水电开发有限公司,南宁530023

出　　处：《水力发电学报》2003年第3期101-106,共6页Journal of Hydroelectric Engineering

摘　　要：本文通过混流式原型水轮机全流道的三维定常和非定常湍流计算 ,预估了水轮机的能量性能、空化特性和压力脉动特性。计算以N S方程为基础 ,基于贴体坐标和交错网格划分 ,对控制方程进行变换和离散。采用SIMPLEC算法实现速度、压力变量的分离求解。非定常湍流计算应用了RNG的k-ε模型。In the present work,the three|dimensional turbulent flow is simulated through t he whole flow passage of Francis archetype turbine.The efficiency,caviation and pressure fluctuation caused by the unsteady flow through Francis turbine is pred icted.Based on Navier|Stokes equations and the RNG k|ε model,the SIMPLEC algo rithm with body|fitted coordination and staggering grid system is applied for t he solution of the discretization governing equations.

关 键 词：动力机械工程 性能预估 三维湍流计算 混流式水轮机 非定常 

分 类 号：TK730.2[交通运输工程—轮机工程]