安装有空气阀的输水管路系统空管充水过程瞬态分析  

Filling transient analysis in pipelines with air valves

作　　者：王玲[1] 王福军[1,2] 黄靖 罗建群 桂新春 谢爱华 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]北京市供水管网系统安全与节能工程技术研究中心,北京100083 [3]株洲南方阀门股份有限公司,湖南株洲412007

出　　处：《水利学报》2017年第10期1240-1249,共10页Journal of Hydraulic Engineering

基　　金：国家自然科学基金项目(51621061);"十二五"国家科技支撑计划项目(2012BAD08B03;2015BAD20B01)

摘　　要：在输水管路系统中,空气阀在预防水柱分离及再弥合水锤方面发挥着关键作用。现有空气阀的应用研究多集中于满管流状态,但对于空管充水阶段空气阀的水锤防护研究较少。为此,本文建立了空管充水过程中空气阀的数学模型,提出了一种基于改进牛顿迭代法和直接求解法相结合的求解空气阀模型的计算方法,分析了进气阀、普通进排气阀和进气微排阀3种类型的空气阀在曲折管线空管充水过程中的水锤防护效果。定量分析表明,为预防空管充水过程中出现的水柱分离及再弥合高压水锤,选择大口径进气,微量排气的空气阀最为合适。该研究对安装有空气阀的输水管路系统的空管充水瞬态分析具有一定的参考价值。Air valve plays a critical role in prevention of column separation and water hammer in pipeline systems. The existing research on air valve application focuses on full pipe flow field, but few studies on water hammer protection with air valve in filling process are considered. To this end, the mathematical mod- el of air valve during pipeline filling is built. A method that combines improved Newton iteration method with direct solving method is proposed in order to calculate the air valve model. On this basis, three differ- ent types of air valves including air admission valve, air inlet and release valve, and air inlet and micro exhaust valve are employed to study the effect of air valve on filling transients. It is indicated that the air inlet and micro exhaust valve is the most appropriate air valve type for the water hammer protection during pipeline filling. This research provides the reference value for the filling transient analysis in pipelines with air valves.

关 键 词：空气阀 空管充水 水锤 瞬变流 改进牛顿迭代法 

分 类 号：TV674[水利工程—水利水电工程]