在有約束、軸對稱拋撒條件下液體玻碎、霧化實驗現(xiàn)象和實驗技術的研究.pdf

1、中國科學技術大學碩士學位論文在有約束、軸對稱拋撒條件下液體玻碎、霧化實驗現(xiàn)象和實驗技術的研究姓名：萬群申請學位級別：碩士專業(yè)：流體力學指導教師：韓肇元2001.5.1Aninvestigationofexperimentalphenomenaandtechnologyforaxisymmetricaldissemination，breakupandatomizationofliquidwithsomeconstrainingAbstra

2、ctThedisseminationbreakupandatomizationofliquidisanimportantresearchfieldforitsbackgroundinEngineeringapplicationandhighacademicvalueAsthebackgroundofFuelAirExplosive(FAE)，inthispaperaninvestigationoftheprocessofprimaryb

3、reakupsecondarybreakupandatomizationundertheconditionofaxisymmetricaldisseminationofliquidwitllsomeconstrmningwasconductedThebreakupandatomizationofliquidinthenearfieldhasbeenobservedbyusingschlierenopticalsystemandthedr

4、opletsizedistribution(DSD)includingthechanginginmeandiametersofdropletswiththetimeandspaceinthefar—fieldhasbeenmeasuredbyusinglaserscatteringmeasurementsystemThemainresearchescanbemainlYdividedintothreepartsAnaxisymmetri

5、caldisseminationdevicewithadjustablegaDswaspresentedanddeveloped，whichcombineswithdiaphragmlessshocktubetorealizethedisseminationof1iquidwithconstrainingWjhavedone10tsofexperimentstostudytheruleofatomizationofliquidinthe

6、nearfieldandfarfieldunderdi舵rentconditions，especially晰tllgapsdifferentinwidthandwithoutgapsSchlierenphotographsinthenearfieldshowthattheincreaseofpressuremakethewholeliquideasytobreakupintoirregularliquidelements，suchas1

7、igamentsbranchesofliquidandthattheseelementsaresmallerwhereisfurtherwayfromthedisseminationdeviceInthefarfield，theexperimentalresultsoflaserscatteringapparatusshowthatatthefixedobservingpointtheSauterMearlDiameter(SMD)of

8、theliquiddropsgeneratedbythesecondarybreakupdecreaseswitllthetimeTheaugmentofpressurebenefitsatomizationInthefar—fieldthefurtherthelocationisthemoretheratioofbigsizedropletsincreasesInadditioninordertoealibratethelasersc

9、atteringsystemwhichismadebyourlaboratoryamicrophotographofglasssandsandanewcastingdevicewithfourlayersofnetshavebeenusedforthispurposeWjfoundthattheconcentrationofcloudshavenoeffectontheexperimentalresultsofthismeasuring