Organic dust ignition in the high temperature flow behind a shock wave

Abstract

A theoretical model was developed to determine the ignition characteristics of organic dust. In this model, an unsteady particle heat transfer equation with an Arrhenius type of reactive source term was coupled with the flow conservation equations. Theoretical results show the influence of dust concentration on the ignition delay time of wheat flour dust. The flammability limits of wheat flour dust have also been estimated. Results also show the effect of particle size on the ignition delay time. The theoretical results were in reasonable agreement with most of the experimental data. © Institution of Chemical Engineers.