超空泡发展过程研究以及对两种研究滑行力方法的评估.pdf

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1、第15卷第3期船舶力学V01．15No．32011年3月JournalofShipMechanicsMar．201lArticleID：1007—7294(2011)03--0199-08andthePlaningStateofSupercavitatingVehicleZHOUJi，lg巧帆，YUKai-ping,ZHANGGuang(SchodofAeronautics，HarbinInstituteofTechnology，Harbin150001，China)Abstract：Inord

2、ertounderstandtheevolutionruleoftheinnerpressureofventilatedsupercavityinitsdevelopingprocessaswellasthecavitystability，unsteadythreedimensionalnumericalsimulationsadoptingthetwo-fluidmuhiphabeflowmodelandDES(DetachedEddySimulationModel)turbulencemod

3、elarecarriedout．Onemethodbasedontherelativemotionandmeshdeformationtechnologyisadoptedtoinvestigatetheplaningstateofsupercavitatingvehicle．Theresultsshowthemethodcanpre-dietthedevelopingprocessofsupercavityanditsinstabilitycharacteristicaswellasthepl

4、aningstateofsupercavitatingvehicles．Thenumericalmethodcanbeusedtofurtherinvestigatetheplaningstateandgivesomesignificantconclusions．Keywords：ventilatedsupercavity；twofluidmultiphaseflowmodel；pitchingmotionCLCnunlber：TV13】．2Documentcode：A1Introduction

5、Supercavityisachievedwhenanunderwatervehicletravelsatasufficienthighspeedorbyinjectingthenon—-condensablegas．Evenforvehiclesdesignedtotravelatnaturalsupercav-itatingvelocity，thedragmustbefirstlyreducedbyventilatedsupercavitatingtoenabletheve-hiclesto

6、acceleratetotheconditionsatwhichthenaturalsupercavitycanbesustained．Theventilatedcavitation[1Jhasbeenprovedtobeasignificantdrag-reductionwayandreceivesgrow-ingresearchattentionsamongCFDpractitioners．Fromthepublishedliterature，naturalcavi—rationhasbee

7、nwidelystudiedinhomogeneousmultiphasemodel【2卅whichignorestheinter-facialdynamics，thatis，thereisassumedtobeno-slipbetweenconstituentsresidinginthe8al'necontrolvolume，andtherationalityofusingthehomogeneousmodelhasbeenverifiedquan-titativelybyexperiment

8、sIs卅．Forventilatedsupercavitating，althoughmanyinvestigationshavebeendonet7咧，thereisfewpublishedliteraturesaboutthedetailsofthegasleakageofsuper-cavity．Ontheotherhand，theresearchontheplaningstateofvehicleisveryimportanttothestabilityandcontroloftrajec