潛艇在有外部搭載情況下操縱性水動力導(dǎo)數(shù)的數(shù)值計(jì)算方法研究.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文潛艇在有外部搭載情況下操縱性水動力導(dǎo)數(shù)的數(shù)值計(jì)算方法研究姓名：楊路春申請學(xué)位級別：碩士專業(yè)：流體力學(xué)指導(dǎo)教師：龐永杰20090101AbstractManeuverabilityisoneofthemostimportantmodemmarineperformancesInordertopredictmarine’Smaneuverabilityperformance，itisnecessarytogetmar

2、ine’ShydrodynamicderivativesinadvanceSimulatenumericallythePMMexperimentbyCFDandmovingmeshtechniquesandcalculatethehydrodynamicderivativesofsubmarineobjectsThesolutionofflowfieldiSbasedonRANSequationsandRNGk一占turbulencem

3、odel，anddisposethemovingmeshbytheapproachcalledPolyhedralVertexBasedMotionSolverproposedbyHrvojeJasakandZeljkoTukovic，anddecouplethevelocityandpressurewithPISOmethodThecontrolequationsofflowaresolvedbyfinitevolumemethoda

4、ndthediscretisationoftemporaltermandspatialtermsareEulerorbackwards、Gamma、linearschemesrespectivelyThecontrolequationsofmovingmesharesolvedbyfiniteelementmethodAcelliSdecomposedbycellandfacesplitWecalculatethehydrodynami

5、cderivativesofellipsoidandSUBOFF1andcomparethepartialresultswiththeoryresultsorHessSmithmethod’Sresults，whichshowsthatthereisahighlevelconfidence，SOthisapproachispotentialtOcalculatethehydrodynamicderivativesofobjectswit

6、hmorecomplexgeometryinsomeextentIntheprocessofcalculatinghydrodynamicderivativesofSUBOFF1，wemonitorthemesh’Squalitiesbysomeparameters，whichshowthatPolyhedralVertexBasedMotionSolvercouldpreservemesh’SqualityLastly，wecalcu