Laser-induced incandescence of free and surface-adsorbed particles
نویسندگان
چکیده
The technique of laser-induced incandescence (LII) has been used to study non-soot, in particular silver particles. Experiments were based on experience with LII soot measurements and a sensitivity analysis regarding the influence of various parameters. Some experimental modifications, e.g. double laser pulse excitation, have been tested. A major extension of the LII technique consists in measurements of wall-adsorbed particles requiring appropriate models for data interpretation and evaluation.
منابع مشابه
Size Distribution Measurement of Candle\'s Soot Nanoparticles by Using Time Resolved Laser Induced Incandescence
Time resolved laser induced incandescence (LII) technique is used to measure size distribution of soot nanoparticles of candle's flame. Pulsed Nd:YAG laser is used to heat nanoparticles to incandescence temperature and the resulting signal is measured. Mass and energy balance equations are numerically solved to calculate temperature of soot particles in low fluence regime. Assuming Plank black ...
متن کاملA web-based interface for modeling laser-induced incandescence (LIISim)
In this study we present a model for laser-induced incandescence (LII). Different heat conduction models can be selected and monoor poly-disperse particles can be chosen as well as isolated, single particles or aggregates. We present a web interface that allows the scientific community to directly use this model. This will simplify the comparison of LII models developed by different research gr...
متن کاملCharacterization of Carbonaceous Particles by Time-resolved Laser-induced Incandescence
Online-characterization of carbonaceous nanoscaled particles is important in different application fields, e.g., in carbon black production or in automobile raw exhaust. For the determination of mass concentration and primary particle size respectively specific surface area, a possible in situ measurement technique is time-resolved laser-induced incandescence (TIRE-LII). The basic principle of ...
متن کاملA combined laser induced incandescence, aerosol mass spectrometry, and scanning mobility particle sizing study of non-premixed ethylene flames
Investigations into the chemical composition of soot particles often rely on samples extracted from the flame environment for subsequent analysis by mass spectrometry. These mass spectra have contributed to the general consensus that polycyclic aromatic hydrocarbons (PAHs) are involved in soot nucleation and surface growth processes. In the pioneering work of Dobbins et al., soot and soot precu...
متن کاملInverse analysis of time-resolved LII data
* Corresponding author: [email protected] International Discussion Meeting and Workshop 2006: Laser-induced Incandescence, Quantitative interpretation, modelling, application Introduction Time-resolved LII has recently evolved into a tool for evaluating particle size distributions in aerosols. Since larger particles cool slower than smaller particles the size distribution can be recovere...
متن کامل