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.