Effects of temperature and composition on the laminar burning velocity of CH_4 + H_2 + O_2 + N_2 flames

摘要

This work summarises available measurements of laminar burning velocities in CH_4 + H_2 + O_2 + N_2 flames at atmospheric pressure performed using a heat flux method. Hydrogen content in the fuel was varied from 0% to 40%, amount of oxygen in the oxidiser was varied from 20.9% down to 16%, and initial temperature of the mixtures was varied from 298 to 418 K. These mixtures could be formed when enrichment by hydrogen is combined with flue gas recirculation. An empirical correlation for the laminar burning velocity covering a complete range of these measurements is derived and compared with experiments and other correlations from the literature.