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

N.M.Rubtsov, B.S.Seplyarsky, I.M.Naboko, V.I.Chernysh, G.I.Tsvetkov, Troshin K.Ya

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.