阀门关闭时间对水锤过程的影响分析

Q4 Environmental Science
A. Kodura
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引用次数: 27

摘要

压力管道瞬态流动的知识对于压力网络的设计和描述是非常重要的。水锤是压力管道中瞬态流动最常见的例子。在此过程中,动能向压力能的转化会引起压力的显著变化,从而导致压力网络管理出现严重问题。这是一个非常复杂的现象,影响其进程的因素很多。在阀门关闭引起水锤的情况下,闸门关闭的特性是最重要的因素之一。然而,这个因素很少被调查。本文对水锤在钢管和聚乙烯管道中的物理实验结果进行了描述和分析。记录每个水锤的压力变化和阀门关闭特性。测量结果与工程师常用的计算方法——米肖方程和伍德和琼斯方法——的计算结果进行了比较。比较表明,计算结果与实验结果有很大的差异。此外,研究表明,蝶阀关闭特性对水锤有显著影响,在分析水锤现象时应考虑到这一点。实验结果与计算结果的比较?可能导致新的、改进的计算方法和描述瞬态流动的新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An Analysis of the Impact of Valve Closure Time on the Course of Water Hammer
Abstract The knowledge of transient flow in pressure pipelines is very important for the designing and describing of pressure networks. The water hammer is the most common example of transient flow in pressure pipelines. During this phenomenon, the transformation of kinetic energy into pressure energy causes significant changes in pressure, which can lead to serious problems in the management of pressure networks. The phenomenon is very complex, and a large number of different factors influence its course. In the case of a water hammer caused by valve closing, the characteristic of gate closure is one of the most important factors. However, this factor is rarely investigated. In this paper, the results of physical experiments with water hammer in steel and PE pipelines are described and analyzed. For each water hammer, characteristics of pressure change and valve closing were recorded. The measurements were compared with the results of calculations perfomed by common methods used by engineers - Michaud’s equation and Wood and Jones’s method. The comparison revealed very significant differences between the results of calculations and the results of experiments. In addition, it was shown that, the characteristic of butterfly valve closure has a significant influence on water hammer, which should be taken into account in analyzing this phenomenon. Comparison of the results of experiments with the results of calculations? may lead to new, improved calculation methods and to new methods to describe transient flow.
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来源期刊
Archives of Hydroengineering and Environmental Mechanics
Archives of Hydroengineering and Environmental Mechanics Environmental Science-Water Science and Technology
CiteScore
1.30
自引率
0.00%
发文量
4
期刊介绍: Archives of Hydro-Engineering and Environmental Mechanics cover the broad area of disciplines related to hydro-engineering, including: hydrodynamics and hydraulics of inlands and sea waters, hydrology, hydroelasticity, ground-water hydraulics, water contamination, coastal engineering, geotechnical engineering, geomechanics, structural mechanics, etc. The main objective of Archives of Hydro-Engineering and Environmental Mechanics is to provide an up-to-date reference to the engineers and scientists engaged in the applications of mechanics to the analysis of various phenomena appearing in the natural environment.
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