Venting Of Deflagrations In Buildings And Equipment : Universal Correlation

The universal correlation for gaseous deflagration venting in coordinates "dimensionless reduced pressure turbulent venting parameter" (Molkov, 1995) have been verified on the widened range of experimental data. These included a collection of 39 literature experimental data, processed with proposed earlier theory (Molkov et al., 1981-1995). Correlation covers the most wide range of explosion conditions at initial atmospheric pressure: enclosure volumes up to 8087 m3; vent ratios F/@I3 0,09-1,23; initially uncovered and covered vents with release overpressure 0-32 kPa and cover inertia 0-23 kgim2; maximum explosion overpressure down to 0,s kPa and up to 380 kPa; most dangerous near stoichiometric air mixtures of natural gas, methane and propane; various shapes of enclosures with ratio of sizes up to 4 : l ; point, plane and jet ignition; with and without complex obstacles and/or external explosions. It has been proved that the universal correlation is a reliable tool for fire and explosion safety engineering. It has been shown that best-fit method usually used by researchers for comparison of theoretical and experimental pressure-time profiles should exploit two adjustable parameters turbulence factor x and discharge coefficient p for satisfactory results.