复合激光诱导荧光定量标定技术及其对喷雾特性研究的应用Ⅰ:燃油喷雾当量比定量标定方法  

Development of Quantitative Calibration Method for Planar Laser Induced Exciplex Fluorescence Technique and Application on the Diesel Spray CharacteristicsⅠ:Study of quantitative calibration method for fuel spray equivalence ratio

作　　者：孙田[1] 苏万华[1] 郭红松[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机学报》2010年第1期1-9,共9页Transactions of Csice

基　　金：国家自然科学基金重点项目(50636040);国家重点基础研究发展规划项目(2007CB210001)

摘　　要：应用复合激光诱导荧光技术建立了定容燃烧弹中荧光强度和喷雾浓度间关系的定量标定方法,获得柴油喷雾气相、液相浓度量化数值,并针对影响定量标定的各种环境因素开展了深入的量化研究。试验中分析了荧光强度和气相喷雾浓度间的系数(Kvapor)随环境条件改变时的变化情况并发现:系数Kvapor随环境压力升高而降低;环境气体成分的变化对系数Kvapor并没有明显影响;环境温度升高使得系数Kvapor呈现先上升后下降的趋势,600K左右是拐点位置,600K以前随温度升高而升高,600K以后随温度升高而快速下降。最终,根据试验结果建立了系数Kvapor随环境温度和环境压力变化的三维Map图,并应用其获得喷雾气相当量比浓度数值和液相浓度数值的定量结果。Quantitative calibration method for PLIEF was developed and established to acquire the relation between the fluorescence and fuel concentration in a fuel spray over wide range of ambient pressure and temperature. The relationship of the coefficient Kvapor in the Lambert-Beer law with ambient pressure and temperature was investigated. The results showed that Kvapor decreased with the increase of ambient pressure. The ambient gas components include CO2 , N2 and H20 and have little influence on Kvapor. As ambient temperature increases, Kvapor is increased before 600 K and decreased after 600 K. A 3-D Map of Kvapor with ambient temperature and pressure was plotted, which was employed to calibrate the PLIEF image of equivalence ratio profile in the spray.

关 键 词：复合激光诱导荧光技术 定量标定技术 喷雾气相当量比 喷雾液相浓度 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]