摘要
为研究某高燃速丁羟推进剂药浆在热、低速撞击刺激下的点火响应特性,制备了两种高燃速药浆(含气率分别为1.6%、0.3%)、两种丁羟推进剂(燃速分别为35 mm/s和5 mm/s);利用自制加热装置、分离式霍普金森压杆(SHPB)、落锤撞击设备开展实验,借助同步热分析红外光谱联用、显微CT扫描、高速摄影等技术分析了推进剂和药浆在热、低速撞击刺激下的点火响应特性。结果表明,高燃速推进剂的热点火温度(241.6℃)显著低于药浆,药浆热点火温度呈现较小的含气率正相关性(含气率为1.6%、0.3%的药浆热点火温度分别为261.3、255.7℃);高燃速药浆的撞击点火阈值受含气率和约束方式影响显著,在无径向约束的SHPB撞击实验里药浆点火阈值与含气率正相关(含气率为1.6%、0.3%的药浆点火阈值分别为71 J和33 J),即高含气率药浆不易撞击起火;有径向约束的落锤实验药浆点火阈值与含气率负相关(含气率为1.6%、0.3%的药浆点火阈值分别为7 J和9 J),即高含气率药浆撞击时更易撞击起火。
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%,respectively)and two kinds of high burning rate propellant(burning rates were 35 mm/s and 5 mm/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 analyzed 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℃)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℃ and 255.7℃,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 71 J and 33 J,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 J and 9 J,respectively),indicating that when slurry with high gas content impacts,it is more likely to impact and ignite.
作者
吴海波
武毅
张超
范红杰
杨钧森
吴艳青
金丰凯
WU Hai-bo;WU Yi;ZHANG Chao;FAN Hong-jie;YANG Jun-sen;WU Yan-qing;JIN Feng-kai(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)
出处
《火炸药学报》
北大核心
2025年第1期95-104,I0007,共11页
Chinese Journal of Explosives & Propellants
基金
国家自然科学基金(No.U2341288)。
关键词
物理化学
固体推进剂
HTPB推进剂
药浆
热刺激
低速撞击
点火响应
physical chemistry
solid propellant
HTPB propellant
slurry
thermal stimulation
low speed impact
ignition response
