水利学报2018，Vol.49Issue(3)：303-312,10.DOI:10.13243/j.cnki.slxb.20170701
黏弹性输水管道中含气瞬变流压力衰减分析
Analysis of pressure damping in air-water transient flow in viscoelastic pipes
摘要
Abstract
Leakage or blockage detection by transient-based techniques is the hot spot and frontier of pipe fault identification in recent research.However,the existence of air makes these techniques difficult for applications in viscoelastic pipes,it is necessary to study the pressure damping and distortion of air-water transient flow in viscoelastic pipes.Firstly,an one-dimensional transient model mnodified by air content (α)is validated by experimental data.Furthermore,the influence of pipe-wall friction and viscoelasticity on pressure damping is studied through energy and Fourier analysis based on the validated model.Finally,a suggestion on parameter calibration is proposed according to practical application.It is concluded:when α＜2.37 ％,the pressure dissipation rate due to pipe-wall friction increases with the increase of α and size-thickness ratio,while the pressure dissipation rate due to pipe-wall viscoelasticity shows an inverse trend,however,both of them decrease as the pipe length increases;when calibrating the transient flow model,it is suggested that the viscoelastic parameters do not need to be corrected when 1％≤α≤ 2.37 ％.关键词
含气瞬变流模型/压力衰减/管壁摩擦/黏弹性效应/参数校核Key words
air-water transient flow/pressure damping/pipe-wall friction/viscoelastic effect/parameter calibration分类
建筑与水利引用本文复制引用
朱炎,吴晨光,袁一星,石振锋..黏弹性输水管道中含气瞬变流压力衰减分析[J].水利学报,2018,49(3):303-312,10.基金项目
国家重点研发计划项目(2016YFC0400603) （2016YFC0400603）
国家自然科学基金项目(51178141) （51178141）
