Venting of deflagrations: Hydrocarbon-air and hydrogen-air systems

摘要: Abstract A set of 34 experiments on vented hydrocarbon–air and hydrogen–air deflagrations in unobstructed enclosures volume up to 4000 m 3 was processed with use the advanced lumped parameter approach. Reasonable compliance between calculated pressure–time curves experimental pressure traces is demonstrated for different explosion conditions, including high, moderate, low extremely reduced overpressures shape ( L max : min 6:1) type position ignition source relative vent, near-stoichiometric air mixtures acetone, methane, natural gas propane, as well lean stoichiometric mixtures. New data were obtained flame stretch deflagrations. The fundamental Le Chatelier–Brown principle analog has been considered detail its universality confirmed. importance this safety engineering emphasized proved by examples. correlation prediction deflagration–outflow interaction number, χ / μ , enclosure scale, Bradley number vent release suggested a wide range conditions. Fractal theory employed verify dependence revealed scale. In spite differences thermodynamic kinetic parameters systems, they both obey same general regularities deflagrations, number.