Generation of Flame Front Turbulence*
作者:
TOSHISUKE HIRANO,
期刊:
Combustion Science and Technology
(Taylor Available online 2000)
卷期:
Volume 158,
issue 1
页码: 35-51
ISSN:0010-2202
年代: 2000
DOI:10.1080/00102200008947326
出版商: Taylor & Francis Group
关键词: turbulent premixed flame;flame front turbulence;turbulence generation mechnisms;flame structure
数据来源: Taylor
摘要:
This article summarizes possible mechanisms of turbulence generation at the premixed flume front elucidated through recent studies. The aspects of flame front turbulence generated under various conditions are presented and the issues on current understanding of the mechanisms of turbulence generation are pointed out. Some mechanisms assumed to cause the flame induced turbulence are shown to be not effective for increasing the turbulence intensity at the flame front. Also, the scale of turbulence appearing on the flame front is discussed. Consideration of the lifetimes of vortices and of the process of flame front deformation is shown to be important for understanding the structure of turbulent premixed flames. The lifetimes of vortices smaller than the scale of the flame front disturbance caused by its instability are too short for these structures to be effective in enhancing the flame front turbulence. Thus, the minimum scale of the turbulence observable at the flame front would be comparable to that of the disturbance caused by flame front instability, and distributed reaction zones hardly appear even in high-intensity turbulent flames.
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