大水头变幅工况下混流式水轮机尾水管水压力脉动分析  

Study of Pressure Fluctuations in Draft Tubes of Francis Type Hydraulic Turbines under Strong Water Head Varying Conditions

作　　者：吴钢[1] 韦彩新[1] 张克危[1] 宋立人[2] 

机构地区：[1]华中理工大学,湖北武汉430074 [2]中国长江三峡工程开发总公司机电处,湖北宜昌443002

出　　处：《发电设备》2000年第4期22-27,共6页Power Equipment

基　　金：国家"九五"攀登计划预选项目资助 !(编号 :PD95 2 190 7)

摘　　要：该文分析了在水头变幅较大的工况下混流式水轮机尾水管压力脉动与转轮出口环量及单位参数之间的关系。以三峡水电站水轮机运行工况为模拟条件进行了混流式水轮机尾水管压力脉动试验研究。研究结果表明 ,适当选定混流式水轮机额定参数对减轻尾水管水压力脉动是十分有效的。图 4表 2参The paper discusses the relationship between pressure fluctuations in draft tubes of francis turbines and the circulation existing at the runners' exit on one hand and the turbines' parameters on the other hand under condition of considerable water head changes. Experimental studies on pressure fluctuation in draft tubes of Francis turbines have bean conducted, simulating operating conditions of the Three Gorges Hydraulic Power Station's turbines. The study results show that the proper choise of parameters at rated conditions is guite effective for mitigating pressure fluctuations in draft tubes of Frencis type hydraulic turbines.

关 键 词：混流式水轮机 尾水管 压力脉动 变幅工况 分析 

分 类 号：TK733.103[交通运输工程—轮机工程]