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缸套-活塞环润滑状态跨尺度模拟及测试方法研究的开题报告.docx

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缸套-活塞环润滑状态跨尺度模拟及测试方法研究的开题报告 Title:StudyonCross-scaleSimulationandTestingMethodforLubricationStatusofCylinderLinerandPistonRing Introduction Thecylinderlinerandpistonringarekeycomponentsininternalcombustionengines,andtheirlubricationstatusdirectlyaffectstheperformanceandservicelifeoftheengine.However,duetothecomplexstructureanddiversifiedoperatingconditions,itisdifficulttoaccuratelymeasurethelubricationstatusofthecylinderlinerandpistonringintheenginerunningstate.Inordertosolvethisproblem,cross-scalesimulationandtestingmethodscanbeusedtoanalyzethelubricationstatusofcylinderlinerandpistonringunderdifferentoperatingconditions,andtoprovidetheoreticalguidanceandtechnicalsupportforoptimizingenginedesignandimprovingperformance. Researchobjectives Themainobjectivesofthisstudyareasfollows: 1.Toestablishacross-scalesimulationmodelforthelubricationstatusofthecylinderlinerandpistonringunderdifferentoperatingconditions,andtoevaluatetheaccuracyandeffectivenessofthemodelthroughcomparisonwithexperimentaldata. 2.Todevelopatestingmethodformeasuringthelubricationstatusofthecylinderlinerandpistonringintheenginerunningstate,andtoverifytheaccuracyandreliabilityofthemethodthroughcomparisonwithsimulationresultsandexperimentaldata. 3.Toanalyzetheinfluenceofdifferentfactorsonthelubricationstatusofthecylinderlinerandpistonring,andtoproposeoptimizationstrategiesforimprovingtheperformanceandservicelifeoftheengine. Researchcontentsandmethods Theresearchcontentsandmethodsofthisstudyaredescribedasfollows: 1.Establishmentofcross-scalesimulationmodel: Basedonthetribologytheory,theprincipleandmechanismoflubricationforthecylinderlinerandpistonringwillbeanalyzed,andthecross-scalesimulationmodelwillbeestablishedusingthecomputationalfluiddynamics(CFD)methodandthediscreteelementmethod(DEM)method.Thesimulationmodelwillincludeagasflowmodel,alubricantflowmodel,andacontactmodelbetweenthepistonringandcylinderliner.Aseriesofsimulationexperimentswillbecarriedouttoevaluatetheaccuracyandeffectivenessofthemodel. 2.D