含分叉结构输水管道泄漏瞬态特性数值模拟

Subjects: Mechanics >> Basic Mechanics submitted time 2023-04-24 Cooperative journals: 《应用力学学报》

张巧玲 吴峰 杨振东 曹佳豪 李国栋 严悦

Abstract： In water transportation projects,due to the constraints of topography and geology,bifurcated pipelines have been widely promoted and applied.The leakage of bifurcated water pipelines is an important issue of great concern to scholars at home and abroad,and the transient flow method is one of the most efficient,accurate and fast leak detection methods at present.Based on this,this paper constructs a transient flow model of water pipeline with bifurcation structure,and explores the influence of different factors on the pressure change at the end of the valve.The factors affecting the pressure change at the end of the valve were investigated.The results show that the difference of pressure curve increases with the increase of the length of bifurcation pipe,the attenuation rate of pressure curve decreases with the increase of valve closing time,and the leakage has little influence on the variation period of pressure curve.The leakage position is different,the shape of the pressure curve at the amplitude is different.When the leakage position is in the upper half of the pipeline,the curve will be convex at the amplitude,and when it is in the lower half of the pipeline,the curve will be concave at the amplitude trend.

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