混流式水轮机内部流动的整体解析及气蚀预测

华南理工大学学报（自然科学版） ›› 2007, Vol. 35 ›› Issue (3): 71-76.

混流式水轮机内部流动的整体解析及气蚀预测

范春学韩风琴久保田乔

华南理工大学电力学院，广东广州 510640

收稿日期:2006-03-08 出版日期:2007-03-25 发布日期:2007-03-25
通信作者: 范春学(1978-)，男，博士生，主要从事流体机械数值仿真研究. E-mail:spsnow@163.com
作者简介:范春学(1978-)，男，博士生，主要从事流体机械数值仿真研究.
基金资助:
国家自然科学基金资助项目(50379015)

Lump-Sum Analysis of Internal Flow in Francis Turbine and Resulted Cavitation Prediction

Fan Chun-xue Han Feng-qin Kubota Takashi

School of Electric Power, South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China

Received:2006-03-08 Online:2007-03-25 Published:2007-03-25
Contact: 范春学(1978-)，男，博士生，主要从事流体机械数值仿真研究. E-mail:spsnow@163.com
About author:范春学(1978-)，男，博士生，主要从事流体机械数值仿真研究.
Supported by:
国家自然科学基金资助项目(50379015)

摘要/Abstract

摘要： 采用计算流体力学方法，将整个水轮机划分为蜗壳、固定导叶叶栅、活动导叶叶栅、转轮和尾水管等几个域，对混流式水轮机进行整体解析，并根据各个域的残差展历，以转轮残差的充分收敛作为迭代计算是否收敛的判据.最后以某水电厂的混流式水轮机作为研究对象，得到了混流式水轮机的静态压力场，并利用压力场预测了转轮叶片出口负压面气蚀的发生时刻及发生部位，所得结果与实际特轮出口负压面气蚀结果一致，表明了文中方法的有效性.

关键词: 混流式水轮机, 整体解析, 特轮, 气蚀预测

Abstract:

The methöd of Computational Fluid Dynamics (CFD) is adopted to carry out a lump-sum analysis of Francis turbine. Irr the analysis , the turbine is divided into several regions including the spiral casing , the stay vane , the guide vane , the runner and the draft tube. According to the variation of the residual error for each re-gion, the sufficient convergence of the residual error for the runner is used as the criterion for the iterative computa-tion.
Then , with the Francis turbine in a hydropower plant as the object , the dimensionless pressure of the turbine is obtained , which is then employed to predict the time and position of cavitation on the suction surface of the run-ner vane. The predicted results accord well with the practical ones , thus verifying the effectiveness of the proposed method.

Key words: Francis turbine, lump-sum analysis, runner, cavitation prediction

范春学韩风琴久保田乔. 混流式水轮机内部流动的整体解析及气蚀预测[J]. 华南理工大学学报（自然科学版）, 2007, 35(3): 71-76.

Fan Chun-xue Han Feng-qin Kubota Takashi. Lump-Sum Analysis of Internal Flow in Francis Turbine and Resulted Cavitation Prediction[J]. Journal of South China University of Technology (Natural Science Edition), 2007, 35(3): 71-76.