Numerical study of influence of surface reaction and heat-loss on flame intensity of methane-air flames

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Hayashi, N.^1 ; Yamashita, H.^1

Department of Mechanical Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan^1

关键词: Flame characteristics;    Flame intensity;    Flame-wall interaction;    Heat Release Rate (HRR);    Methane-air flames;    Parallel channel;    Parallel plates;    Wall temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012019/pdf
DOI  :  10.1088/1742-6596/557/1/012019

来源: IOP

【 摘 要 】

This paper reports a numerical study of influence of radical quenching and heat loss on bulk flame characteristics in narrow parallel channels. Flame-wall interaction is an important phenomenon on combustors. Especially, the wall effects on the flame characteristics in a small scale combustor become larger than those on normal scale one. The wall effects are caused by heat loss and surface reaction. The surface reaction on many common non-catalytic materials may weaken or quench the flames, although those for a catalytic wall can strengthen the flames. Authors have investigated the influence of the surface reaction and the heat loss on a noncatalytic wall using numerical simulation. In this study, a two-dimensional slit burner between two parallel plates with or without surface reaction is modelled. The wall temperature is 500 and 1200 K. The flame behavior and heat release rate distributions are examined when the distance between two plates is changed.