滑移动网格在波浪水面迫降数值模拟中的应用吴宗成1

51120191JOUＲNALOFHAＲBININSTITUTEOFTECHNOLOGYVol.51No.1Jan．2019DOI10．11918/j．issn．0367-6234．2017111551231．1001912．2011093．201210．、33．12%149%．V211．3A0367－6234201901－0080－07ApplicationofslidingdynamicgridtowavywaterditchingsimulationWUZongcheng1HUANGBoen2WUYacong31．KeyLaboratoryofFluidMechanicsMinistryofEducationBeihangUniversityBeijing100191China2．ShanghaiElectro-MechanicalEngineeringInstituteShanghai201109China3．ShanghaiAircraftDesignandＲesearchInstituteShanghai201210ChinaAbstractTostudytheeffectofdifferentcoursesofditchingonwavywateraslidingdynamicgridmethodbasedonrigiddynamicgridandslidinggridisdeveloped．Whileensuringthatthefreesurfaceisinthegridencryptionareaitispossibletosimulateanyattitudeoftheairplaneundercomplicatedseaconditions．Bysimulatingthree-dimensionalrectangularflatplateobliqueimpactintowatertheverticalmovementhistoryandthepressuredistributionarecomparedwithexperimentaldatatoverifytheeffectivenessofnumericalmethodandthegridparametersettingexperienceisalsogot．Thesimulationresultsofairplaneditchingoncalmwaterusingslidingdynamicgridmethodarecomparedwithexperimentaldatatoverifytheeffectivenessofslidingdynamicgridmethod．Onthebasisofapplicationofwavemakingmethodnumericalsimulationofthreedifferentditchingcoursesonwavywatersuchasheadingwavesfollowingwavesandparalleltowavesaremade．Bycomparingandanalyzingthemovementhistoryandtheforceofdifferentpartsitisconcludedthattheoptimalcourseofditchingonwavywaterisparalleltowavestheverticalimpactpeakis12%largerthanthatoncalmwaterandtheeffectsofrollandyawmotionissmall．Themostdangeroussituationisheadingwaveswhichwillproducelargerpitchangletheverticalimpactpeakis149%largerthanthatofcalmwaterditchingandwillsuffermanywaveimpacts．Keywordsairplaneditchingwavywaterdynamicgridnumericalsimulation2017－11－291967—[e-mail]1Wagner2－3．．CFD4．Guo5．Qu6FLUENTNACATN2929．Bensch7－8hybridmethod．Hua9LS－DYNAALE．．、、3．1．VOFＲANSk－ωSST－Menter．10．1a．．1b．．3．1c．31．13Fig．1Comparisonofthreedynamicgridmethods．22．11951Smiley11．．、2．b=0．305mλpλdλp－λd．2Fig．2Diagramofplateobliqueimpactintowaterτ=15°u=13．259m/sv=2．347m/s533．425kg．．、、0．5m1．·18·11Tab．1Gridparameters/m/m/80．0200．000201．2104890．0100．000101．215135100．0050．000051．2203843、．．3Fig．3Movementhistoryof3Dplateobliqueimpactintowater4Smiley．4．λddλp/dλd＞1dλp/dλd1λp≥2．a－b－4－Fig．4Ｒelationshipbetweenthewettedlengthandthelengthbelowtheundisturbedwatersurface5．C11vC=uf1+2sinγsinγ+τdλpdλd－1cosτ+{sinγsinγ+τdλpdλd－1[]2}1/2．·28·51γ=arctanv/uuf=u+vcotτ．5Fig．5PressuredistributionatthecenterlineofthebottomvC6．0．831．v、γdλp/dλdvC．6Fig．6Cpdistributionatthecenterlineofthebottom．2．21953Mcbride12NACATN2929、．Streckwall13ＲANSCOMETDITCHA．5．67kg10°9．144m/sA1．219m61．676m60°．．．、．xzOXOZOX．7、、COMETDITCH．7Streckwall．7Fig．7Movementhistorycomparisonofnumericalsimulationandexperimentsothermethods·38·10．25s35°38°0．93s－10°－8°－2°．．COMETDITCH．33．1141．6～3．6m3．0m．3．0m5．15L/H20～40L/H=30L90m．NACATN29291．2m73736m1/30．H0．1mL3．0m．StokesTT=2πL/槡gη=H/2coskx－ωt+πH/4H/Lcoskx－ωt．k=2π/Lω=2π/T．13m×16m．x=0m、4m．8．ax=0mbx=4m8Fig．8Comparisonofwaveformandtheoreticalvalueofdifferentmonitoringpoints3．2196916．3．12．2．．．16．9．ab9Fig．9Initialpositionsofditching3．3103、．40°35°33°．．、．3120N12%29%270N149%．10c3．·48·5110Fig．10Pitchangleandforcecurvesofditchingonwavywaterandcalmwater．11．11Fig．11Ditchingprocessparalleltowaves、、、5．12．1s0．2～0．3s1．2s28．5°．7373．76m．13．0．5s0°0．5～0．8s．．12Fig．12Variationofairplanerollangleandrollmomentofdifferentparts13Fig．13Variationofairplaneyawangleandyawmomentofdifferentparts12%·58·1149%．41．2、．．3．1VONKAＲMANT．TheimpactonseaplanefloatsduringlandingNACATN321Ｒ．WashingtonNACA19292WAGNEＲH．LandingofseaplanesNACATM622Ｒ．Washing-tonNACA19313WAGNEＲH．berstoβ-undgleitvorgngeanderoberflchevonflüssigkeitenJ．ZeitschriftfürAngewandteMathematikundMechanik1932124193．DOI10．1002/－zamm．193201204024．D．2013GUOBaodong．NumericalstudyonthehydrodynamiccharacteristicsofciviltransportinditchingD．BeijingBeihangUniversity20135GUOBaodongLIUPeiqingQUQiulinetal．EffectofpitchangleoninitialstageofatransportairplaneditchingJ．ChineseJournalofAeronautics201326117．DOI10．1016/j．cja．2012．12．0246QUQiulinHUMingxuanGUOHaoetal．Studyofditchingchar-acteristicsoftransportaircraftbyglobalmovingmeshmethodJ．JournalofAircraft20155251．DOI10．2514/1．C0329937BENSCHLSHIGUNOVVBEUCKGetal．PlannedditchingsimulationofatransportairplaneC//KＲASHUsers’Seminar．Phoenixs．n．20018BENSCHLSHIGUNOVVSDINGH．ComputationalmethodtosimulateplannedditchingofatransportairplaneC//SecondMITConferenceonComputationalFluidandSolidMechanics．BostonComputationalFluid＆SolidMechanics20031251．DOI10．1016/B978－0080440460/－50307－99HUACFANGCCHENGJ．Simulationoffluid－solidinteractiononwaterditchingofanairplanebyALEmethodJ．Journalofhy-drodynamics2011235637．DOI10．1016/S1001－60581060159－X10．NUMECAM．2013GUOＲan．NUMECAseriesoftutorialsM．BeijingMachineryIn-dustryPress201311SMILEYＲF．Anexperimentalstudyofwater－pressuredistributionsduringlandingsandplaningofaheavilyloadedrectangularflat－platemodelNACATN2453Ｒ．WashingtonNACA195112MCBＲIDEEEFISHEＲLJ．Experimentalinvestigationoftheeffec