安装有空气阀的输水管路系统空管充水过程瞬态分析

发布时间：2018-04-09 17:03

本文选题：空气阀　切入点：空管充水　出处：《水利学报》2017年10期

【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。
[Abstract]:Air valve plays a key role in preventing water column separation and water hammer.Most of the existing research on the application of air valve is focused on the state of full pipe flow, but there is little research on the water hammer protection of air valve in the stage of air pipe filling.In this paper, the mathematical model of the hollow valve in the process of air pipe filling is established, and a method of calculating the air valve model based on the combination of improved Newton iteration method and direct solution method is proposed, and the intake valve is analyzed.The water hammer protection effect of three types of air inlet and exhaust valve and intake micro exhaust valve in the process of filling the air pipe of zigzag pipeline.The quantitative analysis shows that in order to prevent the separation of water column and the reclosing of high pressure water hammer in the process of water filling in air pipe, the air valve with large caliber intake and micro exhaust is the most suitable.This study has certain reference value for the transient analysis of empty pipe filling in the water supply pipeline system with empty air valve.
【作者单位】：中国农业大学水利与土木工程学院;北京市供水管网系统安全与节能工程技术研究中心;株洲南方阀门股份有限公司;
【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)
【分类号】：TU991.39

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