有压隧洞流量系数与闸门开度的关系  

Pressure tunnel's discharge coefficient vs gate opening

作　　者：苗宝广[1] 刘善均[1] 徐一民[1] 许唯临[1] 王韦[1] 

机构地区：[1]四川大学高速水力学国家重点实验室,四川成都610065

出　　处：《水利水电技术》2004年第9期70-72,共3页Water Resources and Hydropower Engineering

基　　金：高等学校博士点专项科研基金项目(20030610038).

摘　　要：　通过理论分析和模型试验的方法,系统研究了有压隧洞在闸门各开度时的泄流能力问题,得到了闸门不同开度时对泄流能力影响的定量关系,与试验成果吻合良好,表明闸门开度越小,沿程水头损失和隧洞其他部位局部水头损失越小,但闸门处的局部损失越大,反之亦然,两者综合作用对泄流产生影响.Based on the theoretical analysis and model investigation,discharge capacity for different gate openings of a pressure tunnel was systematically researched and a useful quantificational discharge coefficient formula influenced by gate openings was obtained,where the results coincide well with tested data. It shows that the smaller gate opening,the smaller head loss along the stream and the smaller local head loss in other parts of the tunnel,but the more local head loss at the gate,vice the versa. The two effects will synthetically affect the discharge coefficient.

关 键 词：流量系数 闸门开度 流量控制 有压隧洞 

分 类 号：TV132.13[水利工程—水力学及河流动力学]