Outwardly propagating hydrogen-air turbulent flames were studied at the equivalence ratios from 0.6 to 1.0 and the initial pressures from 0.10 to 0.50MPa. Turbulence intensity, u' was set to 0.80 to 1.59m/s. The Markstein number decreased for increasing pressures and for small equivalence ratios. The ratios of turbulent to unstretched laminar burning velocities at a constant Peclet number increased with increasing turbulence Karlovitz number and decreasing Markstein number at a constant pressure. This burning velocity ratio increased with increasing pressure at the equivalence ratios of 0.6 and 0.8. At the equivalence ratio of 1.0, however, the burning velocity ratio did not increase with increasing pressure although the Markstein number reduced with pressure.
|Translated title of the contribution||Properties of Turbulent Hydrogen-Air Flames at Elevated Pressures(Biomass and Systems Eco-Engine,<Special Issue>Power and Energy System Symposium)|
|Number of pages||2|
|Journal||Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|Publication status||Published - 2009|