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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2011, Vol. 12 Issue (2): 154-161    DOI: 10.1631/jzus.A1000135
Energy Engineering     
Auto-ignition and stabilization mechanism of diluted H2 jet flame
Wei Feng, Zhi-jun Wu, Jun Deng, Li-guang Li
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
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Abstract  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.

Key words： Simulation      Combustor      Auto-ignition      Jet flame      Stabilization mechanism     
Received: 02 April 2010      Published: 08 February 2011
CLC:  TK16  
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Wei Feng, Zhi-jun Wu, Jun Deng, Li-guang Li. Auto-ignition and stabilization mechanism of diluted H2 jet flame. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(2): 154-161.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1000135     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2011/V12/I2/154

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