水切割固体推进剂起爆机理研究进展OA

In response to the growing engineering safety requirements for the expanding scale of solid rocket motor propellant decommissioning disposal,research progress on potential initiation mechanisms during waterjet cutting of solid propellants was systematically reviewed.By analyzing the influence laws of critical factors such as jet pressure,composition characteristics,and thermal accumulation modes on ignition thresholds,the applicability and limitations of current mainstream theoretical models including thermal ignition and impact ignition were evaluated.Research indicates that traditional thermal ignition theory cannot fully explain actual safety incidents,as the monitored temperatures are generally lower than the propellant's thermal decomposition and ignition thresholds.The jet pressure required for impact ignition(>1 GPa)far exceeds commonly used operational parameters,resulting in a relatively low risk of direct initiation in practice.Two types of non-thermally dominated potential initiation mechanisms have been identified:the first is a local overpressure mechanism caused by the collapse of the cavitation bubbles,with instantaneous pressure reaching the order of GPa,comparable to the propellant detonation pressure,and it is more risky due to the absence of liquid damping in waterjet cutting.The second is a dust-cloud deflagration mechanism,in which mixtures containing catalysts such as ferrocene formed during water jet cutting exhibit reduced minimum ignition energy under high-humidity conditions,making them more sensitive to external stimuli such as electrostatic sparks.Current research still faces challenges such as difficulties in monitoring transient local parameters and the lack of coupled multiphysics models.Future efforts should focus on developing high-spatiotemporal-resolution online monitoring techniques,establishing coupled models of cavitation,multiphase flow,and material response,and formulating safety operation guidelines for propellants containing sensitive catalysts,thereby supporting the large-scale safe disposal of decommissioned propellants.