Burning Velocity of Liquefied Petroleum Gas (LPG)−Air Mixtures in the Presence of Exhaust Gas

Abstract

The burning velocities of liquefied petroleum gas (LPG)−air and LPG−air−exhaust mixtures were calculated from pressure−time records obtained in a spherical vessel with central ignition, using a recent correlation based on the cubic law of pressure rise during the early stage of explosion. The burning velocities of LPG−air mixtures with a variable fuel/oxygen ratio at ambient initial conditions are compared to burning velocities of propane−air and n-butane−air mixtures, determined in the same conditions. All experimental data are examined against computed burning velocities, obtained for free laminar premixed flames using a reaction mechanism with 592 elementary reactions and 53 species. The measured and calculated burning velocities are used to examine the inerting effect of exhaust gas.