摘要
为研究密闭空间中复合装药能量的释放特性,设计了一种同轴复合装药,其内层为温压炸药,外层为不同组分的混合燃料,混合燃料主要由铝/聚四氟乙烯(Al/PTFE)活性材料或硼基燃料组成,利用密闭爆炸装置开展了复合装药的内爆炸试验,获取了壁面冲击波超压和准静态压力。试验结果表明:相同质量、不同硼基燃料含量的复合装药在密闭空间内爆炸,产生的准静态压力随着硼基燃料含量的增加呈现先升高后降低的趋势,硼基燃料分解产物参与二次反应的最佳体积分数在1.0%左右;对于复合装药,密闭空间中氧气含量有限,当参与二次反应的物质浓度达到一定阈值时,无论是提高点火能量还是提高反应物浓度,准静态压力都无法获得高效提升,能量利用率没有提高。
In order to study the energy release characteristics of composite charge in confined space,a type of coaxial composite charge was designed with the inner layer of thermobaric explosive JHL-6 and the outer layer of mixed fuel of different components.The mixed fuel was mainly composed of Al/PTFE active material or boron-based fuel.The Al/PTFE active material can undergo a detonation-like reaction and provide energy for shock wave,but its reaction products are all solid.The lack of gaseous medium is not conducive to shock wave propagation.However,boron-based fuel can decompose to produce gas under detonation loading,which can make up for the shortcomings of the Al/PTFE active material.The mixed fuel formulations were designed and the content of boron-based fuel in different formulations was determined.The internal explosion test on composite charge was carried out by using a sealed explosion device.The shock wave overpressure on the device wall and the quasi-static pressure were obtained,which can be used to evaluate the implosion power of the composite charges.The effects of boron-fuel content,secondary ignition energy and reactant concentration on the post-combustion reaction and energy release characteristics of the composite charges were investigated by using the method of implosion power evaluation.The test results show that the quasi-static pressure of the composite charge with the same mass but different boronbased fuel content increases first and then decreases with the increase of boron-based fuel content,and the optimal volume fraction of boron-based fuel decomposition products participating in the secondary reaction is about 1.0%.For the composite charge,because the oxygen content in the confined space is limited,when the concentration of substances involved in the secondary reaction reaches a certain threshold,the quasi-static pressure cannot be effectively improved by increasing the ignition energy or the reactant concentration,so the energy utilization rate is not improved.
作者
张学瑞
周涛
ZHANG Xuerui;ZHOU Tao(Xi’an Modern Chemistry Research Institute,Xi’an 710065,Shaanxi,China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2024年第6期39-47,共9页
Explosion and Shock Waves
基金
国防科技卓越青年科学基金(J-JK-ZQ-2101)。
