TY3100非道路用柴油機(jī)螺旋進(jìn)氣道三維數(shù)值模擬研究.pdf

1、武漢理工大學(xué)碩士學(xué)位論文TY3100非道路用柴油機(jī)螺旋進(jìn)氣道三維數(shù)值模擬研究姓名：李忠照申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：動(dòng)力機(jī)械及工程指導(dǎo)教師：羅馬吉20080501武漢理工大學(xué)碩士學(xué)位論文AbstractEnergyandenvironmentalprotectionhavebecometwomainthemesofthecontemporaryworldAssocietyandeconomydeveloping，theproblemcaus

2、edbynonroaddieselengineemissionhasbccnwidelydrawingpeople’Sattention，andlotsofcountrieshaveestablishednonroaddieselengineemissionregulationForsmallnonroaddieselengines，optimizedmatchingamongthefuelinjection，incylinderair

3、movementandthecombustionchamberisanimportantmeanstOreduceexhaustemissionsTheairquantityenteringthecylindersofadieselengineanditsswirlintensityhasanimportantinfluenceonthepoweroutput，economicalperformanceandemissionsofthe

4、engineSimulationandanalysisfortheflowcharacteristicsinintakeportsbasedOnComputationalHuidDynamics(CFD)methodc姐providereferencestointakesystemoptimizationInthisthesis，thesteadyflowcharacteristicsofthespiralintakeportofTY3

5、100dieselengineWeretestedontheportsteadyflowtestrigandtheintakeportflowperformanceandinfluenceofpressuredifferenceonsteadyflowtestwereanalyzedTheresultsshowthattheswirlratioandflowcoefficientofspiralintakeportwillincreas

6、ewiththeincreasingofvalvelift，buttheincreasingtrendgraduallysloweddownUnderthesamevalvelift，theflowcoefficientdoesnotchangewiththepressuredifferences，andtheswirlratiowillincreasewiththepressuredifferenceincreasesintheund

7、evelopedturbulenceareas，butwillnotvaryinthefulldevclopedturbulenceareasSecondly，anumericalcalculationonthree—dimensionalsteadyflowoftheTY3100enginespiralintakeportWascarriedonbyusingSTARCDsoftwareThethree—dimensionalspir

8、alinletmodelwasestablishedthroughreverseengineeringTheboundaryconditionsweretakenfromtheportsteadyflowtestThecalculationresultshavegoodagreementwiththetestresultsAccordingtothesimulationresults，animprovementschemetothesp