A Study on Reynolds Shear Stress Measurement by LDV

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摘要 ThemeasurementresultsbyLaserDopplerVelocimetry(LDV)arecomparedwiththedirectnumericalsimulationresultbyEggelsetal.^[1]foracylindricalpipeflow.Inthecaseofapipeflow,thebiaserrorformeanvelocityisverysmall,becausethelocalturbulentintensityisverysmallalloverthepipecrosssection.Howeverthedifferenceofthecombinationofu'andv'haveconsiderableeffectsonReynoldsshearstress.Fromourinvestigation,itisfoundthattheselectionofcoincidencetimethatisanecessaryparameterforcombinationofu'andv'ismoreimportantinobtainingtheaccurateReynoldsshearstress.Thesuitablecoincidencetimeisselectedforajetflowandtheeffectivenessofcoincidenttimemethodorequaltimeintervalmethodwithcoincidencedataisshown.
机构地区 不详
出版日期 2001年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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