自补偿型激光诱导白炽光(AC-LII)在测量颗粒物排放中的应用
Auto-Compensating LII (AC-LII) two-color pyrometry to determine theparticle temperature— permits use of low-fluence— particles are kept below the sublimationtemperature this new technique automaticallycompensates for any changes in theexperimental conditions— fluctuations in local ambient temperature— variation in laser fluence— laser beam attenuation by the particulatematter— desorption of condensed volatile materialAC-LII Features in situ and nonintrusive signal is proportional to soot volumefraction spatially resolved time resolved large measurement range— not limited by aggregate size high precision and repeatability high speed data acquisition and analysisAC-LII Benefits dilution of sample not required stable measurement of elemental carbon insensitive to presence of other species can operate at very low concentrations real-time results cycle-resolved measurements possible can provide particulate morphology (size,size distribution, number density) whencombined with scattering