The effect of molecular transport on turbulent combustion of hydrogen-hydrocarbon-air mixtures

Experimental results illustrating a qualitative behavior of turbulent combu stion of hydrogen mixtures with methane and butane in air are discussed. Tu rbulent burning velocities of hydrogen-air mixtures enriched with hydrocarb ons are shown to vary inversely to changes in their laminar burning velocit ies. Correlations between the growth of laminar flamelets and turbulent bur ning velocities at various concentrations of heavy and light reagents are a nalyzed. The hypothesis assuming that the dependence of turbulent burning v elocity on the molecular mixture composition is controlled by the represent ative chemical reaction time at highly curved portions of the name front is supported.