Page 126 - 《水资源与水工程学报》2024年第2期
P. 126
!35 "!2 # & ' ( ) & * + , - Vol.35No.2
2024 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2024
DOI:10.11705/j.issn.1672-643X.2024.02.14
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GHIJK:TV674 LMNOP:A LQRK:1672643X(2024)02012208
Simulationdetectionandevaluationofpipelineleakage
basedoncomputationalfluiddynamics
TAOYi,YANDongfei,MALingna,YANGHuijia,ZHANGJianqi
(Xi’anAerospaceAutomationCo.,Ltd.,Xi’an710065,China)
Abstract:Inordertostudytheimpactofleakageonthechangeofhydraulicfactorsinwatersupplypipe
lines ,theinternalflowandflowfieldchangeprocessofawatersupplypipelinewithorwithoutleakage
pointanddifferentleakagepointsizesweresimulatedbasedoncomputationalfluiddynamics(CFD)
method.Accordingtothesimulationresultsofpipeline1,whent=4s,theflowvelocitynearthepro
posedleakagepointofthenonleakagepipelinewas0.16m/s ,andthepressurewas0.015kPa;whereas
thepeakvelocityofthepipelinewithleakagewas0.32m/s,andthepeakpressurewas0.068kPa.The
overallresultsofthepipelineshowthatwhenthereisnoleakageinthepipeline ,thefluctuationofpres
sureandflowvelocityinthepipelinesectionneartheproposedleakagepointissmall.Duetotheleak
age ,thepressureandflowvelocityinthepipelinesectionneartheleakagepointreachthepeakvalue,
andthepressureandflowvelocityinthedownstreampipelinesectionoftheleakagepointaresignificantly
lowerthanthoseofthenonleakagepipeline.Underdifferentsimulationconditions ,thevariationtrends
offlowvelocityandpressureinthepipelinewithleakageareconsistent ,butthepressurechangesmore
sharplythantheflowvelocity.Inaddition ,thechangeofleakagepointsizeisinverselyproportionalto
thechangeofflowvelocityandpressureinthepipeline.Thisstudycanprovidesomereferentialvaluefor
theformulationofwatersupplypipelineleakagemonitoringschemeandtheoptimizationofmonitoringe
quipmentlayout.
Keywords:computationalfluiddynamics(CFD);pipelineleakage;pressureandflowvelocitymonito
ring ;numericalsimulation
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