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Abstract Abstract： An experimental study on the premixed filtration combustion of propane/air mixtures in a packed bed consisting of inert ball free accumulated with low velocity was conducted. The condition of combustion chamber temperature, combustion wave propagation speed, and emission load were analyzed, and the influence of gas flow velocity and equivalence ratio on the combustion and the emission characteristics were clarified. Based on the premixed filtration combustion, the preevaporated selfsustaining combustion of diesel in porous media at normal pressure was realized, and the temperature characteristics of liquid fuel filtration combustion were studied.Experimental results show that there are great differences between the combustion wave propagation speed and the region of hightemperature in various stages of combustion. With the increase of the equivalence ratio, the average speed of combustion wave is reduced, the combustion temperature is raised, and the emission load is increased. With the increase of the gas flow velocity, the average speed of combustion wave is increased and the emission load is reduced. The highest temperature for liquid fuel filtration combustion is lower than that of gas, and the central temperature of the burner is much higher than that on the wall.
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