泄水锥对水轮机尾水管压力脉动影响的试验研究  

Experimental study on the runner cone effects to the pressure fluctuation of the hydraulic turbine draft tube

作　　者：张广[1] 许彬[1] 吴喜东[1] ZHANC Cuang;XU Bin;WU Xidong(Harbin Institute of Large Electrical Machinery,State Key Laboratory of Hydropower Equipment,Harbin 150040,China)

机构地区：[1]哈尔滨大电机研究所水力发电设备国家重点试验室,哈尔滨150040

出　　处：《黑龙江电力》2018年第3期249-253,共5页Heilongjiang Electric Power

摘　　要：通过水轮机模型试验,对尾水管内产生的空化涡带现象进行观测,同时对尾水管不同位置的压力脉动信号进行采集。讨论了不同形式泄水锥对尾水管压力脉动的影响,并分析了泄水锥减弱尾水压力脉动的基本原理。实验研究结论可提高大型水轮机组稳定性。In this paper,the phenomenon of cavitation vortex which generates in the draft tube is observed by means of turbine model test,and the pressure pulsation signals at different positions of the draft tube are collected. The different forms of runner cones which can influence the pressure pulsation of the draft tube are discussed. The basic principle that the runner cone weakens the pressure fluctuation in the draft tube is analyzed. And the relevant conclusions of this paper have some reference value to improve the stability of the large turbine unit.

关 键 词：混流式水轮机 泄水锥 压力脉动 涡带 

分 类 号：TK730.314[交通运输工程—轮机工程]