Fuel Vaporization and Ignition Las in Diesel Combustion

AN analysis of phenomena occurring during the ignition delay period is presented. Vaporization of atomized fuel is shown to take place under conditions ranging between single droplet and adiabatic saturation from edge to center of the spray. Mechanisms of vaporization and combustible mixture formation are presented for both cases.

Correlation of theoretical analysis with experimental data from both a combustion bomb and diesel engine is presented to establish actual conditions existing during vaporization. Estimates of physical and chemical delays for the engine and bomb are given.