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时间:2020-03-27
《单雾滴与雾滴气溶胶红外辐射特性参数变化规律分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、与开发DOI:10.3969/j.issn.1009-9492.2016.01.018单雾滴与雾滴气溶胶红外辐射特性参数变化规律分析罗成效,杜永成,石松(1.海军装备部驻武汉军代局,湖北武汉430033;2.海军工程大学动力工程学院,湖北武汉430033;3.天津津航计算技术物理研究所,天津300308)摘要:采用Mie散射理论计算分析了单个雾滴和雾滴气溶胶在0.8—20微米波段内的红外辐射特性变化规律。分析表明,单个雾滴的光学效率因子都是随着粒径增大而趋于收敛,消光因子趋于2,散射因子和吸收因子都收敛于l;消光系数随波长的变化不明显,而散射系数和吸收系
2、数近似以1/2的消光系数为轴对称。单个雾滴的散射相函数波动性非常明显,而雾滴气溶胶的散射相函数则较为平滑。单雾滴的不对称因子随雾滴粒径增大趋于0.5,而雾滴气溶胶的不对称因子随波长的增大趋于O.5。单个雾滴的单次反照率随雾滴半径的增大趋向于定值,且接近于1;而雾滴气溶胶的单次反照率随波长的增大无明显规律。关键词:Mie理论;细水雾;红外;辐射特性参数中图分类号:0434-3文献标识码:A文章编号:1009—9492f2016)01—0070—04ChangesRegulationAnalysisontheInfraredRadiativeProperti
3、esofSingleDropletandAerosolLU0Cheng-xiao,DUYong-cheng2,SHISong(1.WuhanMilitaryDeputyBureauofGeneralArmamentDepartment,Wuhan430033,China;2.CollegeofPowerEngineering,NavalUniversityofEngineering,Wuhan430033,china;3.TianjinJinhangInstituteofTechnicalPhysics,Tianjin300308,china)Abstr
4、act:Thechangesregulationoninfr~edradiativepropertiesofsingledropletandaerosoliscalculatedandanalyzed.Theresultsshowthat,opticaleficiencyfactorsconvergealongwiththeincreaseofparticlessizes,ofwhichdistinctionfactorsto2,butscatteringandabsorbingfactorsto1.Thedistinctioncoefficientss
5、hownosignificantchangesalongwiththewavelengthsincreasing.Aapproximatesymmetryrelationshipcanbeacquiredbetweenscatteringandabsorbingcoefficientscurves,withhalfthedistinctioncoefficientsasasymmetryaxis.Thescatteringphasefunctionofsingledropletshowssignificantfluctuantchanges,asacon
6、trary,thatoftheaerosolshowsaflowingcurve.Theasymmetryfactorofasingledropletconvergesto0.5Mongwiththeincreasingofparticlesize,andthatoftheaerosolshowsameregulation,butalongwiththeincreasingofwavelengthsintheregionofthispaper.Thesinglescatteringalbedoofasingledropletconvergestoacon
7、stantalongtheincreasingoftheparticlesize,butthatoftheaerosolshowsnosignificantregulationsalongtheincreasingofthewavelength.Keywords:Mietheory;finewatersprays;infrared;radiativeproperties0前言代表消光“ext”、散射“sca”和吸收“abs”),散人工细水雾在灭火、冷却、降温、除尘、干射相函数咖,单次反照率和不对称因子g。燥等诸多方面有着广泛的应用,这些应用的物理国内外学
8、者在该领域进行了大量研究,其中,哈基础主要是细水雾的流体特性和热特性,而细水尔滨
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