混流式水轮机内三维定常湍流数值研究  

Numerical investigation of three-dimension turbulent flow fields in a Francis turbine

作　　者：郭鹏程[1] 罗兴錡[1] 郑小波[1] 姬晋廷[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048

出　　处：《水动力学研究与进展（A辑）》2006年第2期181-189,共9页Chinese Journal of Hydrodynamics

基　　金：教育部高校博点基金(200400070019);陕西省教育厅专项科研计划项目(05JK264)

摘　　要：基于k-ε紊流模型和三维时均N-S方程,进行了混流式水轮机全流道的三维定常湍流计算。捕捉到了水轮机过流部件内的流场和非最优工况下转轮通道及尾水管内的旋涡结构与演化特征等流动信息。结果表明,水轮机的全通道CFD分析能够较为准确地预测出水轮机过流部件内的性能参数及内部流场结构,所得到的结果对进行水轮机的水力设计或改型优化设计等研究具有重要的指导意义。Numerical simulation of three dirnensional turbulent flow through a Francis turbine was conducted on the basis of Reynolds equations closed by k-ε turbulence model with general coordinates, The results show that the flow field structures and the characteristics of swirling flow and its developing process in the Francis turbine can be well predicted. It can be concluded that the results arc able to provide important guidance for the hydraulic design of Francis turbine or its optimization.

关 键 词：混流式水轮机 全流道 三维紊流 数值研究 

分 类 号：TK733.1[交通运输工程—轮机工程] O357.5[动力工程及工程热物理—流体机械及工程]