New insights into the peculiar behavior of laminar burning velocities of hydrogen-air flames according to pressure and equivalence ratio

作者：Dayma Guillaume^*; Halter Fabien; Dagaut Philippe

来源：Combustion and Flame, 2014, 161(9): 2235-2241.

DOI：10.1016/j.combustflame.2014.02.009

• Laminar flame speeds
• Hydrogen
• Kinetics
• Pressure

Hydrogen is a clean and energetic fuel, and its oxidation mechanism is a subset of the oxidation mechanisms of all hydrocarbons. Therefore, the validation of the available kinetic schemes is of great importance. In the current study, experimental measurements of laminar flame speeds and modeling studies were performed for H-2-air premixed flames over a wide range of equivalence ratios (0.5-4.0) and pressures (0.2-3 bar). The large scale in mixture and thermodynamic conditions allows a better understanding of the peculiar behavior of hydrogen flame speeds with pressure. Two very recent detailed chemical kinetic mechanisms for hydrogen combustion were selected. Excellent agreement was observed between calculations and experimental results, confirming the validity of the kinetic schemes selected. The kinetic analyses performed allow proposing an explanation for the nonmonotonic variation of hydrogen/air flame speed with pressure observed in the experiments.

• 出版日期2014-9