Shock wave ignition of magnesium powders

摘要: The paper is concerned with magnesium powder ignition caused by the interaction of incident shock wave-induced flows. Experimentally observed delays are correlated predicted times for particle melting and onset thermal erosion, a good agreement found between experiment theory. Ignition were measured as functions screening, cloud concentration, strength, initial pressure, oxygen concentration (diluted nitrogen). An expression Nusselt number in Reynolds range 0-10,000 Mach 0-6 proposed. expression, when applied to predict behavior, provides results experimental data M/Re less than 0.5.