旋流式竖井泄洪洞洞内压力特性的试验研究  

Experimental Research on Internal Pressure Characteristics of Rotation-Flow Shaft Spillway Tunnel

作　　者：李生庆 黄涛[2] 

机构地区：[1]云南鲁布革顾问有限公司,云南昆明650051 [2]中国水电顾问集团昆明勘测设计研究院,云南昆明650051

出　　处：《四川水力发电》2013年第B12期135-139,145,共6页Sichuan Hydropower

摘　　要：通过模型试验,对旋流式竖井泄洪洞洞内的压力进行了测量,分析了涡室、竖井侧壁及消力井侧壁、底板的压力变化规律,提出了以冲击压力作为消力井底板失稳的标准。根据对试验数据进行分析得知,与时均压力相比,脉动压力较小且频率较低,对竖井的稳定性影响不大;消力井侧壁及底板峰值频率较竖井突出。Through the experiment on a hydraulic model,we measured the internal pressure in the rotation-flow shaft spillway tunnel,and analyzed the varying pattern of the pressure on volute chamber,shaft sidewall,stilling well sidewall and floor,accordingly proposed to use the impact pressure as the instability standard of stilling well floor. The numerical analyses results show that,compared with the time-averaged pressure,the numerical value of fluctuating pressure is less,and the frequency is lower, so the impact on shaft stability is not big. Also the statistics indicate that the pressure on the stilling well sidewall and floor has higher peak frequency than in the shaft.

关 键 词：旋流式竖井 压力 脉动 试验研究 

分 类 号：TV653[水利工程—水利水电工程]