Determination of burning velocities from spherically expanding H 2 /air flames

摘要: Abstract Laminar burning velocities of hydrogen/air mixtures can show discrepancies up to 30%, making chemical mechanism validation and improvement difficult. The source uncertainties may come from different factors influencing at each processing post-processing steps the final value. Considering a spherically expanding flame configuration, reflection on accuracy formulations, used derive desired quantity, is proposed. Starting exact definition laminar velocity, two formulations – direct indirect speeds are derived for spherical flames. Each single uncertainty involved in pointed out. emphasis focused specific mixture an equivalence ratio 0.50, atmospheric pressure, initial temperature 300 K. This point represents best tradeoff between low velocity recording sampling rate occurrence cellular flames (Le