Parameters, Limits, Attenuation and Suppression of Detonation Wave in a Mixture of a Flammable Gas with Chemically Inert Microparticles
An algorithm for calculation parameters and cell size of a steady detonation wave in a mixture of a gas with chemically inert microparticles are presented. Hydrogen-oxygen, cyclohexane-oxygen and methane-oxygen mixtures with particles of W, WC, Al2O3, SiO2 and KCl are considered. Results of calculations are used for analysis of the method of detonation wave suppression by particles injection before the leading shock front. The criterion of successful quenching of detonation wave is modified. The minimum total mass of particles and the characteristic size of the cloud, which are necessary for detonation wave suppression, are calculated. Results of calculations quite good correspond to available experimental data. The process of suppression is more effective, if particles have high capacity and heat of evaporation. Among the particles under consideration Al2O3 particles are better for detonation suppression.Detonation limits for different chemical compositions of methane-oxygen mixtures and mass fractions of SiO2 particles are calculated. An increase of particles concentration leads to increase of the lower and decrease of the upper detonation limit. If a mass fraction of condensed phase is high enough, detonation wave propagation is impossible. A steady detonation wave reflection from a rigid wall in mixtures of a gas (cyclohexane-O2) with chemically inert microparticles (SiO2) is considered. It is shown, that particles can essentially reduce pressure and temperature behind the reflected wave and therefore prevent crucial destruction of equipment.The efficiency of detonation wave suppression at different relations between fuel and oxidizer is calculated. Cyclohexane-oxygen mixtures with Al2O3 microparticles are considered. It is shown, that at any particles concentration the value of cell size has a minimum, which corresponds to a fuel-rich chemical composition. It means, that for this relation between fuel and oxidizer the efficiency of detonation wave suppression by particles injection has a minimum.
FOMIN P.A. FEDOROV A.V.
Lavrent ’ev Institute of Hydrodynamics SB RAS,Novosibirsk 630090 Russia Khristianovich Institute of Theoretical and Applied Mechanics SB RAS,Novosibirsk 630090 Russia
国际会议
2011 International Autumn Seminar on Propellants,Explosives and Pyrotechnics(2011国际推进剂、炸药、烟火技术秋季研讨会)
南京
英文
519-525
2011-09-20（万方平台首次上网日期，不代表论文的发表时间）