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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.2 P.154-161


Auto-ignition and stabilization mechanism of diluted H2 jet flame

Author(s):  Wei Feng, Zhi-jun Wu, Jun Deng, Li-guang Li

Affiliation(s):  Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200030, China, School of Automotive Studies, Tongji University, Shanghai 200092, China

Corresponding email(s):   avafeng@gmail.com, zjwu@mail.tongji.edu.cn

Key Words:  Simulation, Combustor, Auto-ignition, Jet flame, Stabilization mechanism

Wei Feng, Zhi-jun Wu, Jun Deng, Li-guang Li. Auto-ignition and stabilization mechanism of diluted H2 jet flame[J]. Journal of Zhejiang University Science A, 2011, 12(2): 154-161.

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author="Wei Feng, Zhi-jun Wu, Jun Deng, Li-guang Li",
journal="Journal of Zhejiang University Science A",
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%T Auto-ignition and stabilization mechanism of diluted H2 jet flame
%A Wei Feng
%A Zhi-jun Wu
%A Jun Deng
%A Li-guang Li
%J Journal of Zhejiang University SCIENCE A
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%N 2
%P 154-161
%@ 1673-565X
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000135

T1 - Auto-ignition and stabilization mechanism of diluted H2 jet flame
A1 - Wei Feng
A1 - Zhi-jun Wu
A1 - Jun Deng
A1 - Li-guang Li
J0 - Journal of Zhejiang University Science A
VL - 12
IS - 2
SP - 154
EP - 161
%@ 1673-565X
Y1 - 2011
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1000135

The controllable active thermo-atmosphere combustor (CATAC) has become a utilizable and effective facility because it benefits the optical diagnostics and modeling. This paper presents the modeling research of the auto-ignition and flames of the H2/N2 (H2/CH4/N2, or H2/H2O2/N2) mixture on a CATAC, and shows curves varying with temperatures of auto-ignition delay, the height of the site of auto-ignition of lifted flames, and flame lift-off height. The results of auto-ignition delay and the lift-off height are compared the experimental results to validate the model. A turning point can be seen on each curve, identified with criterion temperature. It can be concluded that when the co-flow temperature is higher than the criterion temperature, the auto-ignition and lifted flame of the mixture are not stable. Conversely, below the criterion temperature, the mixture will auto-ignite in a stable fashion. stabilization mechanisms of auto-ignition and lifted flames are analyzed in terms of the criterion temperature.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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