开孔式泄水锥对混流式水轮机尾水涡带影响的研究  

Study on the Influence of Cone with Holes on the Vortex Zone of Vortex Rope of the Francis Turbine

作　　者：李任飞[1] 赵越[1] 杨聃 刘登峰[3] 史千[1] LI Renfei;ZHAO Yue;YANG Dan;LIU Dengfeng;SHI Qian(State Key Laboratory of Hydro-power Equipment(Harbin Institute of Large Electrical Machinery),Harbin 150040,China;State Grid Zhejiang Electric Power Co.,Ltd.Jinshuitan Hydropower Plant,Lishui 323000,China;Harbin Electric Machinery Company Limited,Harbin 150040,China)

机构地区：[1]水力发电设备国家重点实验室(哈尔滨大电机研究所),哈尔滨150040 [2]国网浙江省电力有限公司紧水滩水力发电厂,浙江丽水323000 [3]哈尔滨电机厂有限责任公司,哈尔滨150040

出　　处：《大电机技术》2020年第2期55-60,共6页Large Electric Machine and Hydraulic Turbine

摘　　要：本文从模型测试和非定常流动分析两方面研究了开孔式泄水锥对混流式水轮机尾水涡带的影响,通过对比水力效率、涡带型式、压力脉动频谱分析,表明泄水锥开孔对于涡带强度具有一定抑制作用,并能在一定程度上降低压力脉动的能量,达到提高机组稳定性的目的。In this paper,the effects of runner cone with holes on the tailwater vortex rope of the Francis turbine are studied from the two aspects of model test and unsteady flow numerical simulation analysis.By comparing the hydraulic efficiency,vortex pattern and pressure pulsation spectrum analysis,the holes of runner cone have effect on reducing vortex rope strength and the energy characteristics of the pressure pulsation,which leads to achieve the purpose of improving the stability of the unit.

关 键 词：混流式水轮机 泄水锥 涡带 压力脉动 

分 类 号：TK733+.1[交通运输工程—轮机工程]