A STUDY OF DEFLAGRATION AND DETONATION IN MULTIPHASE HYDROCARBON AIR MIXTURES

This article represents a theoretical and experimental study of the pr oblems of deflagration and detonation structure in heterogeneous media , which contains an oxidant in the gaseous phase and fuel in the form of either dispersed droplets in the oxidant flow or a thin film on the chamber walls. Detonation in such systems is shown to have a complex unsteady-state structure: the detonation front can exhibit mobile disc ontinuities and can pulsate periodically. A physical model of pulsatin g and spin detonation in heterogeneous media is developed. A system of governing equations with boundary conditions is composed that makes i t possible to simulate mathematically the transition of deflagration t o detonation. The transition process and the initiation of detonation are calculated numerically and studied experimentally. The comparison shows good agreement of theoretical and experimental results.