DDT of the binary fuels H 2 / C 3 H 8-Air mixtures in the obstructed tube

The increasing consumption of the conventionally fo ssil-based fuels, and the relevantly environmental concerns, motivate the prospection and development of new ene rgy sources. Due to its cleanliness and efficiency, hydrogen is under consideration as an alternative e nergy carrier. However, its lower ignition energy, wider flammability and higher propensity for leakage incr ease the explosion hazards in the stockage, transpo rtation and distribution of hydrogen. In the industry, they are usually considered as resulting from the onset of a detonation wave or from the Deflagration to Detonation Transition (DDT) following the flame acceleration. In recently years, Bozier et al. [1], Cheng et al.[2-3], Chaume ix et al.[4], Matignon et al.[5], Medvedev et al.[6 -7], Takita et al.[8] and Yoshida et al.[9] had verified that the addition of a small amount of inhibitors (e.g. prop ane or methane) had attenuated the H 2/Air mixtures detonation properties. It is therefor e of particular importance to further study the characteristics of DDT phenomena in such binary fuels H 2/C3H8-Air mixtures in order to evaluate the potential risk of hydrogen industrial d ngerous scenarios.