Single-shot measurement of soot aggregate sizes by wide-angle light scattering (WALS)
Single-shot measurement of soot aggregate sizes by wide-angle light scattering (WALS)
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DOI：
10.1007/s00340-011-4781-z
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发表时间：
2012-01-01
影响因子：
2.1
通讯作者：
Will, S.
中科院分区：
文献类型：
--
作者：
Oltmann, H.;Reimann, J.;Will, S.
本文利用广角光散射（WALS）方法对单次火焰中煤烟的粒径（旋转半径）进行了测量。关键元件是一个脉冲激光器和一个椭球镜，它将散射在一个平面内的光成像到一个增强的CCD相机上，从而允许以高分辨率瞬时获取完整的散射图。层流预混火焰的计算结果与平均数据吻合较好，证明了该方法的可行性。通过测量弱湍流射流扩散火焰的团聚体尺寸，证明了该技术对非定常燃烧过程的适用性。在这两种情况下，光散射的结果都是通过电子显微镜分析得到的数据来验证的。
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.