發(fā)動(dòng)機(jī)耦合數(shù)值分析.pdf

1、上海交通大學(xué)博士后學(xué)位論文發(fā)動(dòng)機(jī)耦合數(shù)值分析姓名：楊萬(wàn)里申請(qǐng)學(xué)位級(jí)別：博士后專業(yè)：動(dòng)力工程及工程熱物理指導(dǎo)教師：鄧康耀朱航20071220上海交通人學(xué)博士后研究T作報(bào)告AbstractTheentireperformanceoftheinternalcombustionenginemustbeimprovedbecauseofthedrainingenergysourcesandrigorouslawofenvironmentconse

2、rvancyItisnecessarytousethegasolinedirectinjection，turbochargedintercooled，lowheatrejectionandSOontoincreasethespecificpoweroutputTheapplicationoftheabovementionedtechnologiesresultsintheincreaseofthethermalandmechanical

3、loadsTheseincreasetherequirementfortheenginedurabilitySothenumericalanalysismethodsystemmustbeestablishedtosimulatetherigorousoperationconditionandevaluatethestructuraldurabilityfortheengineThetemperaturefieldfromsinglec

4、omponentanalysishasbeenusedtoevaluatetheenNnedurabilitybecausetheaccurateheattransferboundaryconditionsandconnectingrelationamongtheenginepartscannotbegmnedandestablishedTherearesomelimitsforthismethod，anditisverydifficu

5、lttoperformthequantificationalanalysiswhichhastobecarriedoutbyexperimentsItisalongperiod，hifghcostandriskmethodTheabovementionedproblemscanbeSOlvedthroughthecouplingnumericalanalysisoftheentireengineWiththedevelopmentfor

6、theanalysistechnologiesoftheengineperformance，fluidandstructureandtheincreaseofthetestinformationmanyprogresseshavebeenmadeforeachsingletechnologyThelargerequirementforthecouplingnumericalanalysisoftheentireenginehasbeen

7、providedunderthehighpressureofthereductionofthedevelopingperiodandcostSomeelementtypeswhichcanbeusedtosimulatespecialpartshaveappearedinthestructuralanalysisfield，atthesametimethelargeprogresshasbeenmadeforthenonlinearnu

8、mericalanalysisThesebasicdevelopmentworksbecomeagoodfoundationforthecouplingnumericalanalysisoftheentireengineInthepaperthehighcyclepressureinthecylinderhasbeenobtainedthroughthethermodynamicanalysis；theheattransferbound

9、aryconditionsofthecoolingjacket，combustionchamber’oilpipe，intakeandexhaustporthasbeencalculatedthroughCFDanalysis，andtheheattransferboundaryconditionshasbeenmappedontheshellelementofthestructureThenonlinearconnectingrela