基于瞬态计算的混流式水轮机尾水管涡带流场研究.pdfVIP

第四届全国水力机械及其系统会议论文集 基于瞬态计算的混流式水轮机尾水管 涡带流场研究* 1 2 1 2 3 3 张盾 ，郑源 ,黄建军 ,周大庆 ,单建益 ,江俊燕 （1.河海大学水利水电学院，南京，210098 ；2.河海大学能源与电气学院，南京 210098 ；3.浙江广川工程咨 询有限公司，杭州，310020 ） 摘要：基于对某混流式水轮机全流道流场进行三维瞬态粘性湍流计算分析，得到较精确的数值解。并结合与尾水管涡带形态 相关联的因素，选取与水轮机尾水管内流场变化相关联的两组条件进行流场分析；结果反映了在不同条件下尾水管涡带的变 化及流场内速度压力的分布变化，从而为达到预测和解决混流式水轮机水力振动提供一定参考。 关键词：混流式水轮机 尾水管 涡带 紊流模型 中图分类号：TK730.2 Francis Turbine Draft Tube Vortex Flow Field Based on Transient Calculation 1 2 1 2 3 3 ZHANB Dun , ZHENG Yua , HUANG Jianjun , ZHOU Daqing , SHAN Jiayi , JIANG Junan (1.Water Resources and Hydropower College, Hohai University, Nanjing, Jiangsu, 210098; 2.Energy and Electric College, Hohai University, Nanjing, Jiangsu, 210098; 3.Zhejiang Guangchuan engineering consulting Co., Ltd., Hangzhou, 310020) Abstract: Analysis have been based on Francis turbine flow field by a full three-dimensional viscous turbulent transient calculation, and a more accurate numerical solution has been got. Combined with factors associated with the draft tube vortex form, two conditions for analysis associated with draft tube flow patterns are selected; the results reflect the changes in the draft tube vortex and the velocity and pressure of the flow field under the different conditions, so the research provides a reference as to predict and solve the Francis turbine hydraulic vibration. Keywords: Francis turbine draft tube vortex turbulence model 止的导叶和尾水管间形成的动静干扰，对流动的分离和漩涡 0 前言 的产生也有很大影响，使得水轮机内的涡旋流动更加复杂， 故应视其为外部作用和流动自激作用联合引起的非定常流 对于混流式水轮机，尾水管中的低频涡带、转