Fire Safety Science Digital Archive

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., 198 1 - 1995). Correlation covers the most wide range of explosion conditions at initial atmospheric pressure: enclosure volumes up to 8087 m³; vent ratios FIV213 0,09-1,23; initially uncovered and covered vents with release overpressure 0-32 kPa and cover inertia 0-23 kg/m²; maximum explosion overpressure down to 0,5 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: 1; 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.