NEPE推进剂的燃烧转爆轰特性

介绍了燃烧转爆轰的研究方法、表征参数和影响因素.用DDT管、光电管、应变片、验证板研究了NEPE推进剂混合过程中的燃烧转爆轰特性.研究结果表明,NEPE推进剂药浆的诱导爆轰距离与其在DDT管中的装填密度存在典型的U形曲线关系;当实际装填密度大于理论装填密度的95%时,NEPE推进剂药浆在试验条件下无法发生燃烧转爆轰,同时,NEPE推进剂药浆的诱导爆轰距离与DDT管的破碎程度具有较好的相关性,诱导爆轰距离越小,DDT管的破碎程度越严重.由于立式混合机的密闭性及混合过程中推进剂药浆的不均匀性,NEPE推进剂在混合过程中存在燃烧转爆轰的可能性.

Deflagration to Detonation Transition Characteristics of NEPE Propellant

The study ways, characterization parameters and influence factors of deflagration to detonation transition are introduced. DDT tube, photoelectric cell, strain gauge and witness board are used to study the transition characteristics of the deflagration to detonation of NEPE propellant slurry in the mixing process. The relation curve between the predetonation column length of NEPE propellant slurry and the loading density in DDT tube exhibits a typical U shape. The deflagration to detonation transition can not occur for NEPE propellant slurry in the experimental condition, when the loading density of the propellant slurry is more than 95% of theoretical loading density. There is a better correlation between the fragmentation extent of DDT tube and the predetonation column length. The smaller the predetonation column length is, the severer the fragmentation extent of DDT tube. NEPE propellant slurry has the possibility of deflagration to detonation transition, because the vertical mixer is hermetic and the propellant slurry is inhomogeneous in the mixing process.