直流电场对AP/HTPB/Al复合固体推进剂燃烧特性的影响

In order to study the effects of DC electric field on the combustion characteristics of AP/HTPB/ Al composite solid propellant，the propellant grain combustion experiments were carried out under different elec⁃ tric fields. Propellant grain flame，burning surface regression and the motion trajectories of Al agglomerations were observed by high-speed visual photography. The effects of different loading voltages on propellant flame，burning rate and scattering velocity of Al agglomerations were analyzed. The average specific charge and force of Al agglomerations particles was calculated by kinematic analysis. The results show that the ionic wind produced by the high voltage electric field can significantly change the flame shape of the propellant grain. The burning rate of propellant grain increases with the increase of loading voltage，and the reverse electric field has a more signifi⁃ cant effect on the burning rate，which can increase the burning rate by 37%. Al agglomerations are positively charged，and the average specific charge is about（1.58±0.04）×10^-3 C/kg. With the increase of the reverse elec⁃ tric field intensity，the electric field force on the Al agglomerations particles increases gradually，up to 19 times of gravity，and the average scattering velocity decreases gradually，by 49 % most.