基于试验的柴油机进气道参数化设计方法及流通性能仿真研究-动力机械及工程专业论文.docx

螺旋进气道是柴油机气缸盖的重要组成部分，研究其主要结构参数及其相对于气缸的位置对气道流通性能的影响规律，有助于在气道的设计开发中快速得到理想的模型。 本文采用控制变量思想，选取螺旋进气道的6个关键结构参数及其相对于气缸的位置参 数，研究了它们的变化对气道流通性能的影响规律。关键词：柴油机，螺旋与直气道双进气道，参数化设计方法，CFD 仿真，流通性能The ParametricDesignMethodBased on Testand Simulation Study of CirculationPerformance on DieselEngineIntakePortAbstractTheintakeportasanimportantpartofthecylinderhead,whosegeometryandposition relativetothecylinderdeterminedtheflowcoefficientandthesizeoftheswirlstrength, whichhaveanimportantimpactonpowerandeconomyofdieselengines.Inthispaper,the authorcarriedoutsomeresearchworksuchasquicklyandefficientlyintakeport three-dimensionaldesign,usingthetestmethodtoevaluatetheprosandconsoftheintake port,usingthesoftwarenamedFIREtosimulatetheintakeportflowandusedtoimprovethe designoftheintake port,aswellas the keystructuralparameters ofthe helicalintake portand itsflowpropertiesandregularity,basedonthepreviousresearchaboutthedesignofthe intakeport.Developedakindofparametricdesignmethodofintakeportwhichhasagood robustness,andthedesigntimecanbeshortenedabout3/4;Anadvancedhelicalandstraight airwayconceptofdualintakeportwasintroduced,effectivelysolvedthecontradiction between the size ofthe swirlstrengthandflow coefficient. Ultimatelythe authorformed afast and efficientparametric designmethodtohelicaland straightintake port.Theauthorprocessedtheresinmodelbyrapidprototypingtechnology，completedthesteadyflowexperiments,simulatedtheflowpropertiesoftheintakeportbyaCFDanalysis software,andimprovedtheintakeportonthisbasis.Finallytheauthordidsomeresearches about therelationshipbetweentheflowpropertiesofintakeportand thekeystructural parameters and positionalparameters.Becausethemethodofparametricdesignhasadvantagesofshortdevelopmentcycleand modifyeasily,etc,itwas used todesignthe engineintake portinthis paper.This papermainly describedtheparametricdesignmethodofamorecomplexshapeofthehelicalintakeport, andestablishedaparametrichelixandstraightdoubleintakeportmodelofadiesel-type,and completed aresincoreboxofintake p