On the location of flame edge in Shadowgraph pictures of spherical flames: a theoretical and experimental study

被引：29
作者：
Parsinejad, Farzan
Keck, James C.
Metghalchi, Hameed
机构：
[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
[2] Northeastern Univ, Dept Mech & Ind Engn, Boston, MA 02115 USA
来源：
EXPERIMENTS IN FLUIDS | 2007年 / 43卷 / 06期
关键词：
Flame Front; Shadowgraph Image; Flame Thickness; Preheat Zone; Spherical Flame;
D O I：
10.1007/s00348-007-0355-6
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this paper, a theoretical model based on geometrical optics has been developed to analyze the light intensity pattern of Shadowgraph pictures of spherical flames. The theoretical results have been compared with experimental measurement of light intensity profiles across the flame front using commercially available image processing software. These results are in good agreement. The theory predicts that the sudden change of light intensity from dark to bright does not coincide with the flame edge unless the flame thickness is negligible. Experimental results agree very well with the theoretical predictions.
引用
收藏
页码：887 / 894
页数：8
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