组合工况下阻抗式调压室涌浪计算的显式公式  

Explicit formulas for calculating surges in throttled surge chamber

作　　者：张永良[1] 缪明非[1] 

机构地区：[1]清华大学水利水电工程系水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水利学报》2012年第4期467-472,479,共7页Journal of Hydraulic Engineering

基　　金：国家自然科学基金(50539070);清华大学自主科研计划资助(2009THZ07060、20101081791)

摘　　要：对组合工况下的调压室内水体涌波进行理论分析,采用非线性微分方程的渐近法求解组合工况条件下阻抗式调压室涌波非线性常微分方程,分别推导出先弃荷后增荷和先增荷后弃荷两种组合工况下调压室质体大波动最低和最高涌浪水位的分析公式,对理论分析公式所获得的涌浪与数值计算结果进行了比较,从而验证了理论分析公式。该公式可以方便地应用到带有调压室引水发电站的工程设计中去。An analytical study was conducted for water mass oscillation in a surge chamber of hydroelectric station under combined load cases. The asymptotic method of nonlinear oscillation was used to solve the nonlinear ordinary differential equation of mass oscillation in throttled surge chambers under combined load cases. Analytical formulas were derived for the lowest water level in surge chamber under the condition in which loads increase at adverse time after load rejection, and for the highest water level in surge chamber under the condition in which loads were rejected at adverse time after increasing load, respectively. The re- suits obtained by using the analytical formulas were compared with that of numerical calculation. It was found that good agreement was achieved.

关 键 词：阻抗式调压室 大波动 涌浪 组合工况 

分 类 号：TV134[水利工程—水力学及河流动力学]