柴油機缸蓋冷卻水套流動換熱的數(shù)值研究.pdf

1、哈爾濱工程大學碩士學位論文柴油機缸蓋冷卻水套流動換熱的數(shù)值研究姓名：董明申請學位級別：碩士專業(yè)：熱能工程指導教師：王革20090601哈爾濱T程大學碩十學位論文ABSTRACTWiththeincreasingofICE’Sstrengthandperformancetarget，dieselengineendureshigherheatandmechanicalloadsintheworkingprocessIt’seasytocau

2、selocaloverheatattheregionwherehasabaddesignorinsufficientcooling，SOimprovingcoolingsystemhasbecomeallimportanttasktodesignoriginalengines，andthenumericalsimulationontheflowandheattransferisaprinciplemethodtooptimumtheco

3、olingsystemofdieselengineheadThisarticlewhichtakesPA6BdieselenginecylinderheadastheobjectforstudyinghascarriedonthetheoreticalanalysistothecoolingwaterthreedimensionalflowfieldsAccordingtothetwo—dimensionalblueprintofdie

4、selenginecylinderhead，usingthethreedimensionalCADsoftwarePro／En酉neertoestablishthecylinderheadcoolingwaterflowfieldofthegeometricmodel，theoriginalwaterinthecavityensureconsistencyasfaraspossibleunderthepremiseofanecessar

5、ysimplificationThemodelischeckedandmeshedbytheFLUENTpreprocessGAMBIT，subsequently，theflowfieldarecomputedanddisplayed，andthentheresultsarepostprocessedandanalyzedallbyFLUENTFromanalysisofsimulationresults，wecanseethatthe

6、dieselenginecylinderheadcoolingwatercavitydesignisreasonable，andCallmeetthedesignrequirementsofthecoolingeffect，thoughtherearesomeplaceswhereneedoptimization，mainlyinthenoseareaandexhaustvalveseatandshouldbeappropriatest

7、rengthenedtoachievetheoptimumcoolingeffectThenthreesortsofremodeledwaterjacketdesigncaseswereputforward，andthefinaldesignwhichcanmeetthecoolingrequirementswasdeterminedatlastbytheCFDresultscomparisonFinallythispaperstudi