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Numerical Simulation of Detonation Excitation at Shock Wave Interaction with Dust Cloud in Channel
Author(s) -
Khmel T.
Publication year - 2002
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/1617-7061(200203)1:1<361::aid-pamm361>3.0.co;2-f
Subject(s) - detonation , shock wave , mechanics , oblique shock , shock (circulatory) , moving shock , plane (geometry) , physics , reflection (computer programming) , rarefaction (ecology) , geometry , geology , explosive material , chemistry , paleontology , mathematics , organic chemistry , medicine , computer science , species richness , programming language
The study of detonation ability of reactive particle gas mixtures is necessary to prevent industrial explosions in industries where dispersed powders are used. The present paper focuses on numerical simulation of the shock wave interaction with semiinfinite aluminum dust cloud, which is situated inside a plane channel. The cloud fills entirely or partly the channel cross‐section and has initially a rectangular shape. The scenarios of detonation initiation in the cloud are determined depending on the incident shock wave amplitude values. The processes of transformation and spreading of finite width clouds under weak incident shock wave action (when the particles do not ignite) are investigated. The types of an oblique shock wave reflection from the plane of symmetry in the cloud are analyzed. The processes of particle ignition and detonation structure formation at strong incident shock wave action are investigated. Nonstationary periodic fuctuations take place in the detonation flow due to transversal wave effect. Nevertheless the detonation structure established propagates in quasistationary regime. If the incident shock wave is attenuated with a rarefaction wave then the detonation formation fails at clouds of insufficient width.