Propagation of detonation wave in hydrogen–air mixture in channels with sound-absorbing surfaces

The possibility of using sound-absorbing surfaces for attenuating the intensity of detonation waves propagating in hydrogen–air mixtures has been experimentally studied in a cylindrical detonation tube open at one end, with an explosive initiated by spark discharge at the closed end. Sound-absorbing elements were made of an acoustic-grade foamed rubber with density of 0.035 g/cm$^3$ containing open pores with an average diameter of 0.5 mm. The degree of attenuation of the detonation wave front velocity was determined as dependent on the volume fraction of hydrogen in the gas mixture.