摘要
Informationofdropletsizeandsizedistributionlaysthebasisforinvestigationsofatomizationmechanismsandperformanceoptimization.However,thelaserdiffractionandphaseDopplerparticleanalyzershavedifficultyinaccuratelycharacterizingsprayswithawiderangeofdropletsizesandverylargedroplets,especiallyifalargenumberofdropletsareaspherical.Amethodtomeasuresizeinsuchlargedropletspraysbasedondigitalimagingwithbackwardilluminationwasdeveloped,includinganimageacquisitionsystemandimageprocessprograms.Calibrationofthemeasurementsystemwasperformedusingadotcalibrationtargetwithdifferentdotsizes.Anexperimentalsetupwasdesignedandestablishedtocharacterizespraynozzlesunderdifferentoperationloads,aswellasdifferentnozzlearrangements.Resultsshowthatthedropletsizeofspraysrangesfromdozensofmicronstoseveralmillimeters.Thesuperiorityofwideloadrangeforsuchnozzleswasindicatedbythesize-measurementresultsunderhalf-loadtofull-loadoperations.Thepresentstudyrevealedthattheimageprocessingtechniquecanbeeffectivelyimplementedforin-linesizemeasurementsofsprayswithawidedistributionofdropletsizeandasphericaldroplets,whichwouldbedifficulttocharacterizebyothermethods.
出版日期
2015年05月15日（中国期刊网平台首次上网日期，不代表论文的发表时间）
