Promoting of foam copper with chaotic distributed pores on the deflagration of premixed hydrogen-air flame in the tube

The deflagration flame of stoichiometric hydrogen-air mixtures is studied in this paper. Combined with the foam copper structure, characteristic analyzed experimental results show that can improve flow instability at front and degree turbulence propagation process, propagates more rapidly state, number stages morphology during process in-creases. classic ?tulip? be transformed into a distorted fractal before it collapses. When passes through copper, velocity increases as structural layers increases. supersonic speed accumulation three copper. overpressure will cause oscillation. More oscillation frequency, amplitude are increased significantly. Foam structure has reverse action on over-pressure. value low early stage, promotes propagation, but large later blocking effect.