改变侧体姿态角的三体船水动力性能数值模拟

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1、改变侧体姿态角的三体船水动力性能数值模拟ABSTRACT^The21thcenturyisacenturyofocean，andhumanactivitiesinoceanlife，mineraland。waterresourcesappearmuchmoreintense，SOexploringandmakinguseofoceanresource枣demandhigherrequirementstoimproveshiphydrodynamicperformances．Nowmallycountriespourhugea

2、mountofcostintomakingresearchabouthighperformanceships，andasonekindofnewhighperformanceships，thetrimaranhasbeenhighlyrecognized．Whenshipsaretravellingathighspeeds，thecharacteristicsofflowfieldaroundshipsandatiersternwillaffectshiphydrodynamicperformance．Researchers

3、pursueallthetimethatthroughadoptingvariousmethodsforimprovingtheflowfieldaroundships，makingtheshippossessthebestcharacteristicsofhydrodynamicperformance．Theflowfieldaroundthetrimaran^becomesmorecomplicatedduetotheexistenceofthesidehulls，andthehydrodynamicsoftrimara

4、nhasbeenchangedconsiderably．Sohowtooptimizetheconfigurationandimprovethehydrodynamicperformanceoftrimaranisoneofthefocuses．Inthispaper,thefloWfieldaroundatrimaranissimulatedinordertoanalyzethechangeoftheflowandhydrodynamicperformancewhentheconfigurationofthesidehul

5、lofthetrilllaranischanged．The鲥disusedtodiscretespaceregionandthequalityofitwillaffectthestability,convergenceandaccuracyofthesimulation．Becausetheshapeoftrimaranisconsiderablycomplicated，formingthegridonthetrimaranisverydifficult．Sothewayofgriddingonthetrimaranisve

6、ryimportant．Inthepaper,themain-hullWassimulatedwithdifferentgridsizesOntheshipsurface，differentdistanceofthefirstlayerofthenodesandgriddistributionofflowfield．Comparisonofthenumericalsimulationwiththeexperimentaldataproposedsomesuitablesetforformingthegrid．AndthenO

7、ilabovebasis，threesetsofdifferent西dswereformedonthetrimaran．ResearchesaboutCFDverification，validationandconvergencvwerecarriedout．Allprovethevalidityofsomesuitablesetofthegrid．ChoosingsuitableturbulencemodelsisallimportantfactoraSwellinshipCFD．themain-hullandtrimar

8、anwhichhavebeeninvestigatedwereusedasatestcasetoanalyzetheeffectsofsevendifferentturbulencemodelsintheaspectsofflowdetailsandresistartceoftheship