关键词: 固体推进剂;推进剂燃烧;裂纹扩展;爆燃;爆轰

Abstract: In solid rocket motors, crack propagation and convective combustion in solid propellants have influence on the interior-ballistic parameters seriously. Investigated results indicate that strong coupling exists among crack deformation, propagation and convective combustion dependent on the achievements of convective combustion, crack dynamic propagation and consideration of the coupling. On the one-dimensional assumption, flame spreading and parameters of convective combustion are studied in details. Crack deformation and propagation is investigated preliminary under convective combustion condition. Experimental research reveals various propagation patterns of single crack under various chamber pressure rates. It was often pointed out in literatures that DDT may be induced by discontinuous flame spreading in cracks, abrupt pressurization at crack tip and unstable crack propagation under convective combustion.

Key words: Solid propellant;propellant combustion;Crack propagation;Deflagration;Detonation