Acoustic instabilities in hydrogen-air mixtures in the closed reactor at the central spark initiation

N.M.Rubtsov, B.S.Seplyarsky, I

Abstract

It was shown that inhomogeneities detected in light emission that arise after contact of a flame front with the walls of cylindrical reactor can be correlated with occurrence of acoustic waves by the example of combustion of hydrogen-air mixtures containing 30 and 15 % of hydrogen. It is revealed that flame velocities in stoichiometric hydrogen-air mixtures at central spark initiation do not depend on the material of inner reactor surface but on its shape.