Deflagrations in spherical vessels: A comparison among four approximate burning velocity formulae

Measuring the violence of dust explosions with the “20l sphere” and with the standard “ISO 1m3 vessel”

“…A few reasonable theories describe some ''simple'' situations such as the isotropic stable propagation of thin flame in a spherical closed vessel with a central ignition (Bradley & Mitcheson, 1978;Evans, 1994 Garforth, 1980) and have been used successfully. If S c is the burning velocity (laminar/turbulent), R is the radius of the vessel, P 0 is the initial pressure (at the ignition time), it can be shown that (g is the ratio of the specific heat capacities):…”

Experiment-based investigations of magnesium dust explosion characteristics

“…Explosions initiated with 1000 J present a slow burning velocity. Due to the weak activation a small part of dust cloud is ignited, which to a larger extent would allow a self-sustained dust flame to propagate away from the ignition zone toward the vessel wall in terms of the simple spherical flame propagation (Evans, 1994). As the ignition energy is raised, the volume of ignition zone augments and thereby the effective flame front stretches.…”