柴油機(jī)缸蓋冷卻水套流動(dòng)換熱的數(shù)值研究.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文柴油機(jī)缸蓋冷卻水套流動(dòng)換熱的數(shù)值研究姓名：董明申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：熱能工程指導(dǎo)教師：王革20090601哈爾濱T程大學(xué)碩十學(xué)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