有机玻璃管道直接水锤压力特性试验研究
Experimental study on direct water hammer pressure characteristics in PMMA pipelines
张小莹 1边少康 1冯梦雪 2陆伟 2张健3
作者信息
- 1. 新疆农业大学水利与土木工程学院,新疆 乌鲁木齐 830052
- 2. 中水珠江规划勘测设计有限公司,广东 广州 510610
- 3. 河海大学水利水电学院,江苏 南京 210098
- 折叠
摘要
为了了解黏弹性管道的水锤压力特性,文中通过搭建水库-管道-阀门系统模型,进行了系列关阀水锤试验,针对有机玻璃管道中末端阀门初始开度分别为 30%,100%时关阀产生的直接水锤压力变化规律进行了研究,从黏弹性材料的本构关系角度分析了关阀时间对黏弹性材料直接水锤的影响机理,并对 2 种不同初始开度下阀门附近的流场进行了三维数值模拟.研究结果表明:黏弹性管道中直接水锤压力变化规律与传统的水锤理论不符,直接水锤压力不仅与阀门的关闭时间有关,还与阀门的初始开度有关,满足"阀门关闭越快,直接水锤压力越大"与"阀门初始开度越小,直接水锤压力越大"的规律.
Abstract
To understand the water hammer pressure characteristics of viscoelastic pipelines,a series of shut-off valve water hammer tests were conducted by construction of a reservoir-pipeline-valve sys-tem model.The direct water hammer pressure change law generated by the shut-off valve for the Poly-methyl Methacrylate(PMMA)pipeline at the initial opening were 30％,100％of the end valves were studied.From the perspective of the constitutive relationship of viscoelastic materials,the influence mechanism of valve closing time on the direct water hammer of viscoelastic materials was analyzed.The 3D numerical simulations were conducted on the flow field at two different initial openings near the valve.The results show that the variation of direct water hammer pressure in viscoelastic pipelines is in-consistent with traditional water hammer theory.Direct water hammer pressure is related to the valve closing time and the valve initial opening time.The laws of"The faster the valve closes,the greater the direct water hammer pressure"and "The smaller the initial opening of the valve,the greater the direct water hammer pressure"are met.
关键词
黏弹性管道/直接水锤/关阀时间/阀门开度/试验研究Key words
viscoelastic pipeline/direct water hammer/valve closing time/valve opening/experimental study引用本文复制引用
基金项目
新疆维吾尔自治区自然科学基金青年基金(2021D01B57)
新疆维吾尔自治区重大科技专项(2022A02003-4)
国家自然科学基金(52179062)
国家自然科学基金(51879087)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据