Cellular instabilities of non-adiabatic laminar flat methane/hydrogen oxy-fuel flames highly diluted with CO2 (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Cellular instabilities of non-adiabatic laminar flat methane/hydrogen oxy-fuel flames highly diluted with CO2 (PDF)
- 发表刊物：
- Fuel
- 摘要：
- Cellular instability of non-adiabatic laminar premixed flat methane/hydrogen oxy-fuel flames highly diluted with CO2 was studied systematically. The CH4/H2/CO2/O2 flames were stabilized on a McKenna burner at atmospheric pressure. The CH4/H2/CO2/O2 flames with varied equivalence ratios and hydrogen mole fractions were investigated. Quantitative structure parameters of the cellular flame fronts were obtained with OH-PLIF technique. On the basis of experimental results, theoretical analysis was made to clarify the effect of mixture properties and heat loss on flame cellular instability. Results showed that cellular flame structure appeared near the lean limit combustion condition. Cell number of flame and its hydrodynamic factor, WDL, present a positive correlation. The average stand-off distance, L, is well identified to characterize the cellular flames. Average cell amplitude, A, and wavelength, k, increased with the increase of L. A good indicator of instability level, Ak, was defined. The RS model was used in a linear stability analysis, and the onset of cellular flames was found to be governed by both hydrodynamic and thermal-diffusive instability mechanisms, while the heat loss made the flame more stable. The RS model is not an appropriate model to predict critical wavenumber for the non-adiabatic flame.
- 合写作者：
- Jin W, Wang JH, Yu SB, Nie YH, Xie YL, Huang ZH
- 卷号：
- 2015, 143: 38-46
- 页面范围：
- 38-46
- 是否译文：
- 否
- 发表时间：
- 2015-02-10