高燃速丁羟推进剂药浆在热与低速撞击刺激下点火响应的实验研究

In order to study the ignition response characteristics of HTPB propellant slurry with high burning rate under heat and low speed impact Stimulation, two kinds of high burning rate propellant slurry (gas Contents were 1.6% and 0. 3%, respec-tively) and two kinds of high burning rate propellant (burning rates were 35mm/s and 5mm/s, respectively) were prepared. The experiments were carried out by self-made heating device, Separated Hopkinson Pressure Bar (SHPB) and drop hammer impact equipments. The ignition response characteristics of propellant and slurry under thermal and low-speed impacts were an-alyzed by means of synchronous thermal analysis infrared spectroscopy, micro-CT scanning and high-speed photography. The results show that the thermal ignition temperature of the propellant with high burning rate (241. 6 °C) is significantly lower than that of the slurry, and the thermal ignition temperature of the slurry presents a small positive correlation with gas content (thermal ignition temperature of the slurry with gas content of 1.6% and 0.3% are 261. 3 °C and 255. 7 °C, respectively). The impact ignition threshold of the slurry with high burning rate is significantly affected by the gas content and restraint mode. In the SHPB impact test without radial constraint, the ignition threshold of the slurry is positively correlated with the gas content (ignition thresholds of the slurry with 1.6% and 0.3% gas content are 71J and 33J, respectively), indicating that the slurry with high gas content is not easy to be impacted and ignited. In the drop hammer test with radial constraints, the ignition threshold of slurry is negatively correlated with the gas content (the ignition threshold of slurry with gas content of 1.6% and 0.3% are 7] and 9J-respectively). indicating that when slurry with high gas content impacts, it is more likely to impact and ignite.