泵阀动作给水管线水力瞬变计算模型研究  

Model for the calculation of transient hydraulics caused by the valve motion in water supply pipe line

作　　者：廖宗蓉[1] 

机构地区：[1]四川建筑职业技术学院设备工程系,德阳618000

出　　处：《给水排水》2016年第2期121-125,共5页Water & Wastewater Engineering

摘　　要：由于管道内压力瞬间升高,压力波在管道内以声速传递,导致水力系统流量和压力动态变化,即产生水力瞬变(水锤),通过刚性水锤模型和弹性水锤模型分析给水管线水力瞬变,采用简化的有限差分方程,建立特征线法水力瞬变数学模型,并建立了泵、阀动作的边界条件,可借助于特征线方程和边界条件方程,求解管线内水锤波的暂态,以解决复杂的管路系统和边界条件的水锤问题。Hydraulic transient（water hammer）refers to the dynamic change of flow and pressure in hydraulic system,which comes from the fact that transient increase of water pressure in the pipes would cause pressure waves and transmit it in sound velocity.In this paper,hydraulic transient was analyzed through rigid water hammer model and flexible water hammer model.Simplified finite difference equation was adopted to build a characteristics-method mathematical model for hydraulic transient and set up boundary conditions for pump motions and valve motions.Characteristic method equation and boundary conditions equation were used to get the transient of water hammer waves in pipelines so as to solve the problems of water hammer in complicated pipeline system and boundary conditions.

关 键 词：泵阀动作 给水管线 水力瞬变 计算模型 

分 类 号：TU990.3[建筑科学—市政工程]