动水环境中有限宽窄缝湍射流的水力特性研究

200412SHUILIXUEBAO121:0559-9350(2004)12-0051-06121(1.3000722.430072)(PIV)TV137AYasuhiroKamotani[1]Kelso[2]Crabb[3]Qi[4]Demuren[5][6]1PIV(1)1300cm50cm100cm700cmU00.1003m/sBL0.5cm10cm0.5cm30cmRv=UJ/U0=1.06.06HRec=U0H/44880TSIULTRA-PIV-10ns532nm50400mJ1050Hz2003-10-29(59979022)(1974-)200412SHUILIXUEBAO122CCD()PIV30.35g/L3.35mm3.35mm(32Pixel32Pixel)PIV110.050.005mm97%1.071g/cm3mm7.410-52.210-4s1PIV22.110cm0.5cm2.04.06.022.04.06.0()(Rv=2.0)(Rv=4.0Rv=6.0)2(bc)(3)200412SHUILIXUEBAO1232200412SHUILIXUEBAO12432.2[3]4(Rv=2.04.06.0)[7](Rv=2.04.06.08.0)L/BRv6.0B2.3[6]=vBUvBWUWBxfBZcfjcfj,,,(1)45Rv=2.06.0(1)Z/B=b(X/B)a(2)b=bRvc(56)aba0.38b8200412SHUILIXUEBAO125Z/B=2.72Rv0.70(X/B)0.38(3)562.4(9)Xbmax/BRvAR()ARXbmax/BRvARRvARBXb027.0021.1logmax+=⋅7ab8200412SHUILIXUEBAO1269103(1)(2)6.0B(3)(4)AR[1]YasuhiroKamotani,IssaacCreber.Experimentonaturbulentjetinacrossflow[J].AIAA.Journal,1972,10:425-1429.[2]KelsoRM,LimTT.Anexperimentstudyofroundjetsincrossflow[J].JFluidMech.1996,306:111-144.[3]CrabbD,DuraoDFG,WhitelawJH.Aroundjetnormaltoacrossflow[J].ASME,J.FluidsEng.,1981,103:142-153.[4]QiMeilan,FuRenshou,ChenZhicong.Computationsforplaneturbulentimpingingjetincrossflow[J].JofHydrodynamics,1999,(4):23-37.[5]DemurentAO.Characteristicsofthree-dimensionalturbulentjetsincrossflow[J].Int.JEngngSci.,1993,31:899-913.[6].[J].1998(4)7-14.[7].[A].[C]..2002.133-140.200412SHUILIXUEBAO127StudyonverticalturbulentslotjetimpingingintocrossflowJIANGGuo-qiang1,LIWei2,TAOJian-hua1(1.TianjinUniversity,Tianjin300072,China;2.WuhanUniversity,Wuhan430072,China)Abstract:Theflowcharacteristicsofslotimpingingjetswithfinitewidthanddifferentvelocityratio(ratioofimpingingvelocitytocrossflowvelocity)arestudiedexperimentallybymeansofPIVtechnique.Numericalsimulationisalsocarriedouttohelpfurtheranalyzethe3-Dflowcharacteristicsinthenear-field.Itisfoundthatthepotentialcoreofthejetincreaseswiththeincreaseofthevelocityratioandtendstothesameasthelengthofplanefreeturbulentjet.TheReynoldsnumberwillnotremarkablyaffectthejettrajectory.Thejettrajectoryismainlycontrolledbythevelocityratio.Therelationshipbetweenextentofreverseflowandvelocityratioaswellastherelationshipbetweenextentofreverseflowandgeometricparametersoftheslotarealsoinvestigated.Keywords:finitewidthslotturbulentjet;flowcharacteristic;nearfield;crossflow;geometricparameters