Single-shot measurement of soot aggregate sizes by wide-angle light scattering (WALS)

被引：50
|
作者：
Oltmann, H. [1 ]
Reimann, J. [1 ]
Will, S. [1 ]
机构：
[1] Univ Bremen, D-28359 Bremen, Germany
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2012年 / 106卷 / 01期
关键词：
LASER-INDUCED INCANDESCENCE; TURBULENT-DIFFUSION FLAMES; DEBYE-GANS THEORY; PARTICLE-SIZE; OPTICAL-PROPERTIES; VOLUME FRACTIONS; OVERFIRE SOOT; MORPHOLOGY; EXTINCTION; NUMBER;
D O I：
10.1007/s00340-011-4781-z
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The wide-angle light scattering (WALS) approach has been utilized for the measurement of soot aggregate sizes (radii of gyration) in flames on a single-shot basis. Key elements are a pulsed laser and an ellipsoidal mirror, which images the light scattered within a plane onto an intensified CCD camera, thus allowing for an instantaneous acquisition of a full scattering diagram with high resolution. Results for a laminar premixed flame exhibit good agreement with averaged data and demonstrate the feasibility of the method. The applicability of the technique to unsteady combustion processes is demonstrated by measuring aggregate sizes in a weakly turbulent jet-diffusion flame. In both cases light scattering results are verified by data obtained from electron microscopy analysis of sampled soot.
引用
收藏
页码：171 / 183
页数：13
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