ABSTRACT
Equations for flame movement and pressure rise during explosion in a closed vessel will be developed for an isothermal system with central ignition assuming the pressure is uniform throughout the vessel. Equations for an adiabatic system are developed in a similar manner to that for the isothermal system. The average temperatures in the burnt and unburnt zones for the adiabatic system are not constant, but are related to the degree of compression. Mathematical relations between pressure, flame front, and time have been offered by a number of investigators. Data from experiments and literature on dust and gas explosions in closed vessels will be presented to show the effects of the vessel size and shape, the initial pressure, temperature, turbulence, the fuel-air ratio, intensity of ignition source, mixed fuels, and the gases liberated during explosion. The maximum pressure produced by an explosion increases linearly with an increase in initial vessel pressure over a moderate range.
