有压管道过渡过程的数值计算  

Numerical Calculation of the Transients in Pressure Pipeline

作　　者：薛超[1] 郑源[2] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学能源与电气学院,江苏南京210098

出　　处：《人民黄河》2011年第10期113-115,120,共4页Yellow River

基　　金："十一五"国家科技支撑计划项目(2006BAB04A03)

摘　　要：基于理想气体状态方程和全新的圆形管道水体积与水深关系数学模型,按照小流量充水原则,结合空气阀的进、排气性质和泄水管的排水特性,对一定的充水流量和不同的放水流量下有压管道充、放水过程中气体压力的变化进行了数值计算。结果表明:在小流量充水的情况下,管内的气体压力不是很高,放水流量越大,对应管段的气体压力越小、管道越危险。Based on the ideal gas equation of state and the new mathematical model of the relationship between the water volume and water depth in circular pipe,with the principle of water filling in low discharge,in combination with the characteristics of air valves and drain pipes,the air pressure changes in pressure pipeline were numerically calculated according to the definite water filling discharge and the different water emptying discharges.The results show that the air pressure inside the pipe is low,the greater the water emptying discharge,the lower the corresponding air pressure and the higher pipe risk.

关 键 词：复合式空气阀 充水过程 放水过程 理想气体状态方程 有压管道 

分 类 号：TV134[水利工程—水力学及河流动力学]