水下航行体表面空泡形成过程的分析

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1、-哈尔滨工业大学工学硕士学位论文AbstractAnumericalmethodisdevelopedforsolvingtheprocessofformingcavityonthemovingobjectintheplanarmovingmeshwhentheobjectmovesintheimmobileliquid.theReynoldstime-averagedmethodandk-εdoubleequationsmodelareadopted.Themovingmeshmethodisusedtoelimin

2、atetheimpossibilityofsimulatingtheprocessofenteringandfloatingupwaterwhentheobjectisimmobile.BasedonSIMPLEalgorithm,thecrisscrossgridtechniqueandfinite-volumemethod,andthediscriminationalgebraicequationissolvedbyusedG-Siterativemethod.Usingthismethod,theplanarpr

3、ocessofformingcavityiscalculatedforliquidflowingaroundtheimmobileobjectandobjectmovingintheimmobileliquid.Themainresearchisstudyingtheresultofusingdifferentgasvelocitytoformcavitywhentheliquidflowaroundtheimmobileobjectortheobjectmoveintheimmobileliquid.It’sshow

4、edthatthevolumeofgasupontheobjectraisesupandflowingvelocityofliquidincreaseswithincreasinggasvelocity.Thedifferenceofthecavityshapeisdiscoveredwhentheobjectfloatupandentertheliquid.Numericalresultsareingoodagreementwithexperimentalresearch.Asaboundaryofreattachm

5、entpoint,itisstillusefulforimprovingthequalityofgascavityandthevelocityofmovingunderwaterwhenthecavityappears.Andit’salsoimportanttocontrolthevelocityoffloatinginabound.Theprogramofusingrocketunderwateristoughbutdoable.KeywordsCavity；MovingMesh；TurbulentFlow；Num

6、ericalsimulation；Underwater-II----哈尔滨工业大学工学硕士学位论文目录摘要......................................................................................................................I Abstract.................................................................................

7、...............................II 第1章绪论.........................................................................................................1 1.1引言............................................................................................................1 1

8、.2水下航行物体表面充气空泡形成过程特性及研究..................................1 1.3国内外在该方向的研究现状及分析.........................................................2 1.4超空泡技术在实际中的应用...............