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Flammability limits of hydrogen/air mixtures



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2nd International Topical Meeting on Safety and Technology of Nuclear Hydrogen Production, Control, and Management 2010, juin 2010, Pages 17-24  

Type de document > *Congrès/colloque

Mots clés >

Unité de recherche > IRSN/DSR/SAGR

Auteurs > CHEIKHRAVAT Homan, CHAUMEIX Nabiha, BENTAIB Ahmed, PAILLARD Claude-Etienne

Date de publication > 01/06/2010


In the framework of nuclear safety related to a hypothetical hydrogen release it is fundamental to assess the risk of explosion according to the initial temperature and pressure. Indeed, among the different combustion parameters necessary to assess the risk of explosion (ignition energy, flame velocity, burning rates, energy release…) the flammability limits are fundamental. They are defined as the lowest and highest fuel concentrations for which a self-sustained flame can be obtained. Near these limits it is also important to identify the type of propagation that will take place depending on different parameters such as the ignition energy, experimental device, phenomena due to buoyancy… The aim of the present work is to identify characterize the type of combustion of hydrogen / air mixtures near the flammability limits for different initial temperatures (25 up 150°C) and pressures (1 and 2.5 bars) relevant with Pressurized Water Reactor conditions.