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:1672643X(2024)02012208

                           Simulationdetectionandevaluationofpipelineleakage
                                     basedoncomputationalfluiddynamics

                             TAOYi,YANDongfei,MALingna,YANGHuijia,ZHANGJianqi
                                     (Xi’anAerospaceAutomationCo.,Ltd.,Xi’an710065,China)

                 Abstract:Inordertostudytheimpactofleakageonthechangeofhydraulicfactorsinwatersupplypipe
                 lines ,theinternalflowandflowfieldchangeprocessofawatersupplypipelinewithorwithoutleakage
                 pointanddifferentleakagepointsizesweresimulatedbasedoncomputationalfluiddynamics(CFD)
                 method.Accordingtothesimulationresultsofpipeline1,whent=4s,theflowvelocitynearthepro
                 posedleakagepointofthenonleakagepipelinewas0.16m/s ,andthepressurewas0.015kPa;whereas
                 thepeakvelocityofthepipelinewithleakagewas0.32m/s,andthepeakpressurewas0.068kPa.The
                 overallresultsofthepipelineshowthatwhenthereisnoleakageinthepipeline ,thefluctuationofpres
                 sureandflowvelocityinthepipelinesectionneartheproposedleakagepointissmall.Duetotheleak
                 age ,thepressureandflowvelocityinthepipelinesectionneartheleakagepointreachthepeakvalue,
                 andthepressureandflowvelocityinthedownstreampipelinesectionoftheleakagepointaresignificantly
                 lowerthanthoseofthenonleakagepipeline.Underdifferentsimulationconditions ,thevariationtrends
                 offlowvelocityandpressureinthepipelinewithleakageareconsistent ,butthepressurechangesmore
                 sharplythantheflowvelocity.Inaddition ,thechangeofleakagepointsizeisinverselyproportionalto
                 thechangeofflowvelocityandpressureinthepipeline.Thisstudycanprovidesomereferentialvaluefor
                 theformulationofwatersupplypipelineleakagemonitoringschemeandtheoptimizationofmonitoringe
                 quipmentlayout.
                 Keywords:computationalfluiddynamics(CFD);pipelineleakage;pressureandflowvelocitymonito
                 ring ;numericalsimulation

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