流体管道小孔泄漏建模与仿真研究

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1、研究与DOI：10．3969／j．issn．1009-9492．2015．03．004流体管道小孔泄漏建模与仿真研究马弘毅，闫宏伟，李昕，陈伶(中北大学机械与动力工程学院，山西太原030051)摘要：流体管道小孔泄漏流场的研究以及数值模拟所得数据对泄漏的检测、定位技术的研究具有重要参考意义。由伯努利方程、连续性方程组成的方程组表明当上游来流速度、下游静压强一定时，泄漏孔直径大小、入口速度、管道内外静压强差将影响流场特性。基于FLUENT的输水管道小孑L泄漏流场数值模拟数据表明在模拟泄漏孔径范围内泄漏速度主要

2、由管道内外静压强差决定，管道内外静压强差与泄漏速度成正相关关系。泄漏孔处的质量流量主要由泄漏孔直径、管道内外静压强差决定，管道内外静压强差一定时泄漏孔直径与泄漏孔处质量流量成正相关关系。泄漏孔直径大小、流场入口速度、管道内外压强差对流场人出口静压强差产生影响，数据显示流场入口速度的影响最大，与流场入出口静压强差成正相关关系。关键词：流体管道；小孔泄漏；仿真模型中图分类号：TP391．9文献标识码：A文章编号：1009—9492f2015)03—0015—03ResearchonModelingandSimu

3、lationofFluidPipeSmallHoleLeakageMAHong-yi，YANHong-wei，LIXin，CHENLing(NorthUniversityofChina，SchoolofMechanicsandPowerEngineering，Taiyuan030051，China)Abstract：Theresearchesoffluidpipesmallholeleakageanddataofflowfieldnumericalsimulationhadimportantreferenc

4、esignificancestothetechnologiesofleakagedetectionandlocation．TheequationsconsistedofBernoulliequationandcontinuityequationindicatedcharacteristicsofflowfieldwareinfluencedbyleakageholediameter，inletvelocity，thestaticpressuredifferencebetweeninsideandoutsid

5、eofthepipewheninletvelocityandoutletstaticpressurewarefixedvalues．TheresultsofwaterpipelinesmallholeleakagenumericalsimulationsbasedonFLUENTshowedtheleakagevelocitywasdeterminedbystaticpressuredifferencesbetweeninternalandexternalofleakagepipe，theleakageve

6、locityhadpositivelyrelationtostaticpressuredifferencesbetweeninternalandexternalofleakagepipe．Themassflowrateofleakageholewasdeterminedbyleakholediameterandstaticpressuredifferencesbetweeninternalandexternalofleakagepipe，themassflowrateofleakageholehadposi

7、tivelyrelationtostaticpressuredifferencesbetweeninternalandexternalofleakagepipe．Thestaticpressuredifferencesbetweeninletandoutletwareinfluencedbyleakholediameter，inletvelocityandstaticpressuredifferencesbetweeninternalandexternalofleakagepipe，thestaticpre

8、ssuredifferencesbetweeninletandoutletwasmajorinfluencedbyinletvelocityshowedbydata，thestaticpressuredifferencesbetweeninletandoutlethadpositivelyrelationtoinletvelocity．Keywords：fluidpipe；smallholeleak；simula