NDLI: Flame front structure and burning velocity of turbulent premixed CH4/H2/air flames

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Flame front structure and burning velocity of turbulent premixed CH4/H2/air flames

Content Provider	Semantic Scholar
Author	Zhang, Meng Wang, Jinhua Xie, Yongliang Wei, Zi Liang Huang, Zuohua Kobayashi, Hideaki
Copyright Year	2013
Abstract	Flame front structure of turbulent premixed CH4/H2/air flames at various hydrogen frac- tions was investigated with OH-PLIF technique. A nozzle-type burner was used to achieve the stabilized turbulent premixed flames. Hot-wire anemometer measurement and OH- PLIF observation were performed to measure the turbulent flow and detect the instanta- neous flame front structure, respectively. The hydrogen fractions of 0%, 5%, 10% and 20% were studied. Results show that the flame front structures of the turbulent premixed flames are wrinkled flame front with small scale convex and concave structures compared to that of the laminar-flame front. The wrinkle intensity of flame front is promoted with the increase of turbulence intensity as well as hydrogen fraction. Hydrogen addition pro- motes the flame intrinsic instability which leads to the active response of laminar flame to turbulence and results in the much more wrinkled flame front structure. The value of ST/SL increases monotonically with the increase of u 0 /SL and hydrogen fraction. The increase of ST/SL with the increase of hydrogen fraction is mainly attributed to the diffusive-thermal instability effects represented by the effective Lewis number, Leeff. A general correlation between ST/SL and u0/SL is provided from the experimental data fitting in the form of ST/
Starting Page	11421
Ending Page	11428
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1016/j.ijhydene.2013.05.051
Volume Number	38
Alternate Webpage(s)	http://gr.xjtu.edu.cn/upload/22045/Frame+front+structure+and+burning+velocity+of+turbulent+premixed+Ch4-H2-air+flames.pdf
Alternate Webpage(s)	http://gr.xjtu.edu.cn/c/document_library/get_file?folderId=2611952&name=DLFE-116933.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.ijhydene.2013.05.051
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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