二甲醚噴霧特性的dpiv試驗(yàn)測量與數(shù)值模擬研究

1、華中科技大學(xué)碩士學(xué)位論文二甲醚噴霧特性的DPIV試驗(yàn)測量與數(shù)值模擬研究姓名：周光明申請學(xué)位級別：碩士專業(yè)：動力機(jī)械及工程指導(dǎo)教師：張煜盛20070125IIABSTRACTDimethylEther(DME)isveryprospectivetouseonconventionaldieselhomogeneousgecompressionignition(HCCI)enginesasanefficientcleanalternative

2、fuels.TheacteristicsoffuelsprayareimptanttounderstfundamentalmechanisminfluenceparametersoftheDMEcombustionprocessinthesekindsofengines.InthisstudythemixingacteristicsmechanismoftheDMEfuelspraytheinfluencefactsareinvesti

3、gatedbyexperimentalnumericalstudies.BasedontheNationalBasicResearchProgramofChina(973program)theresearchwkundertakenthispaperpresentsanstudyonthemacroscopicmicroscopicacteristicsofDMEspraywhichhelpstoimprovethedesigndeve

4、lopmentapplicationofDMEengines.Firstofalltheresearchstatusofthemechanismtestingmethodsnumericalsimulationoffuelspraysareintroducedreviewed.TheDigitalParticleImageVelocimetry(DPIV)techniqueisdeterminedfthetestingofDMEspra

5、y.TheprincipleconfigurationsofDPIVareillustratedahighpressureconstantvolumebombwithanopticalaccessbaseonDPIVfthemeasurementofDMEsprayhasbeenbuilt.Theschemeofthisexperimentisdesignedsomeproblemswhichneedtobepaymeattention

6、toarepointedout.ThenthroughtheanalysisofDPIVexperimentsthedetailspraystructuressurfacewaveofDMEarevisualized.ThequalitativeanalysesofconcentrationdistributionshavebeenmadethefactswhichinfluencethemacroacteristicofDMEspra

7、yareertained.Theexperimentalresultsalsorevealthemechanismthedevelopmentprocesssprayacteristicsofflashboilingphenomenon.InthisstudytheDMEsprayacteristicsarealsoinvestigatedbynumericalcalculation.Themathematicmodelsofeachp