王明晓, 邓凯, 管清强, et al. Effect of hydrogen volume fraction on combustion instability of hydrogen/methane premixed flame under different equivalence rates[J]. 2018, 33(12).
王明晓, 邓凯, 管清强, et al. Effect of hydrogen volume fraction on combustion instability of hydrogen/methane premixed flame under different equivalence rates[J]. 2018, 33(12).DOI: 10.13224/j.cnki.jasp.2018.12.005.
The combustion instability of premixed bluff-body flame under acoustic excitation at different equivalence rates (0.8
1.0
1.2) and hydrogen volume fraction (0
10%
20%) was analyzed. The combustion instability could be captured by the flame transfer functions and the flame front distribution could be shown by CH chemiluminescence measurement. Results showed that the combustion characteristics were very sensitive to the fraction of hydrogen in the fuel mixture. When equivalence rates were 0.8 and 1.0
the amplitude of flame transfer functions and heat release fluctuations increased with hydrogen concentration. And with the increase of hydrogen concentration
the combustion instability of premixed flame became stronger. When hydrogen volume fraction increased at equivalence rate of 1.2
the amplitude of flame transfer functions firstly reduced then increased.