混流式水轮机尾水管压力脉动试验分析  

Pressure Fluctuation Test Analysis for Draft Tube of Mixed Flow Turbine

作　　者：王林 

机构地区：[1]浙江富春江水电设备有限公司,浙江杭州310000

出　　处：《水电站机电技术》2016年第7期5-8,共4页Mechanical & Electrical Technique of Hydropower Station

摘　　要：压力脉动产生于机组运行过程的非定常流场,是引起水轮机组振动及不稳定运行的主要水力振动源之一。其中,尾水管的螺旋状涡带是引起水力振动的最主要因素。本文通过对混流式水轮机模型试验,研究了混流式水轮机尾水管内压力脉动与空化系数、泄水锥形状及补气量的相互关系。Pressure fluctuation,occurring in an unsteady flow field during unit operation,is one of the main hydraulic vibration sources causing vibration and operation instability of hydraulic turbine generator unit.The helical vortex strip of draft tube is the main factor causing hydraulic vibration.This paper,through model tests for mixed flow turbine,studies the relationships between pressure fluctuation in the draft tube of mixed flow turbine and cavitation coefficient,runner cone shape,and air make-up.

关 键 词：混流式水轮机 尾水管压力脉动 空化系数 泄水锥形状 补气量 模型试验 

分 类 号：TV131[水利工程—水力学及河流动力学]