Very lean hydrogen-air mixtures experience strong diffusive-thermal types of cellular instabilities that tend to increase the laminar burning velocity above the value that applies to steady, planar laminar flames that are homogeneous in transverse directions. Flame balls constitute an extreme limit of evolution of cellular flames. To account qualitatively for the ultimate effect of diffusive-th...

The growing implementation of exhaust gas recirculation (EGR) in reducing NO(x) emissions of engine is of paramount motivation to perform a fundamental research on the flammability characteristics of fuel-air-diluent mixtures. In this work, the influences of EGR on the flammability region of natural gas-air-diluent flames were experimentally studied in a constant volume bomb. An assumption of c...

This experimental study focuses on quantifying and understanding the e ects of external acoustical perturbations on condensed phase combustion pro cesses In the present con guration a burning liquid methanol droplet is suspended within an essentially one dimensional acoustic waveguide where standing waves of variable frequency and amplitude are gen erated by a loudspeaker placed at the end of t...