调压室连接管尺寸对水位波动和水击压力的影响分析  

Effect of Connection Pipe Size of Surge Chamber on Surge Wave and Water Hammer Pressure

作　　者：胡祥伟[1] 胡明[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2013年第4期89-92,共4页Water Resources and Power

摘　　要：由于调压室涌浪和水击压力受连接管尺寸影响较大,针对水库—调压室—阀门引水系统,推导了计入连接管长度与直径情况下阀门瞬间关闭时调压室波动的解析公式,利用特征线法计入斜坡项进行数值计算,验证了公式推导结果,并分析了不同连接管长度和直径下调压室水位波动幅值、周期和阀门端水击压力上升值的变化规律。对比分析结果表明,在管径较小时调压室涌浪相对值随连接管长度变化较快;连接管长一定时,阀门端水击压力在某一管径比下上升较快,应加以重视。As a result of the surge chamber wave and water hammer pressure are influenced by the connection pipe size, this paper deduces the analytic formulas of surge chamber wave in the diversion system of reservoir-surge chambervalve by taking into account the connection pipe length and diameter with the valve shutting down instantly. The derivation formulas are verified by using the method of characteristics including the slope entry. And then the variation rules of the surge amplitude, period and the added value of water hammer pressure in surge chamber with different connection pipe length and diameter are analyzed. The comparative analysis shows that the relative value of water hammer pressure changes rapidly with the connection pipe length in the condition of smaller connection pipe diameter; the water hammer pressure of valve-side increase rapidly in certain diameter ratio; attentions should be paid to its effects on water hammer pressure.

关 键 词：连接管尺寸 水体惯性 摩阻 调压室涌浪 水击压力 

分 类 号：TV732.5[水利工程—水利水电工程]