摘要
为了探究典型金属粉末对燃料空气炸药(fuel air explosive,FAE)冲击波效应和热毁伤性能的影响,采用20 L球形液体爆炸测试系统并结合比色测温方法,深入研究了不同金属粉种类和含量下环氧丙烷(epoxypropane,PO)的燃爆特性、火焰结构及温度分布特征。实验结果表明:纯环氧丙烷的最佳质量浓度为780 g/m^(3),最大爆燃超压Δp_(max)=0.799 MPa,最大压力上升速率(dp/dt)_(max)=52.438 MPa/s。添加Al粉、Ti粉和Mg粉的环氧丙烷最大燃爆超压、最大压力上升速率和最大火焰平均温度均随着金属粉末质量比(I)的增加而增大,而最大压力上升时间的变化趋势则与之相反;最大燃爆超压和最大火焰平均温度的变化规律一致,从大到小依次为:Al/PO、Mg/PO、Ti/PO,且当金属粉的质量比I=40%时,3种固-液混合燃料的?pmax值相较于纯环氧丙烷分别增加了12.00%、8.41%和11.54%;此外,最大压力上升速率和燃烧速率的变化规律一致,从大到小依次为:Mg/PO、Al/PO、Ti/PO,且当金属粉的质量比I=40%时,3种固-液混合燃料的(dp/dt)max值相较于纯环氧丙烷分别增加了41.91%、39.60%和45.29%。研究结果表明,不同高能金属粉末在改善环氧丙烷燃爆性能方面各有优势,在FAE的配方设计时,应根据毁伤性能指标合理选择金属粉末作为含能添加剂。
To investigate the influence of typical metal powders on the shock wave effect and thermal damage performance of fuel air explosive(FAE),the explosion characteristics,flame structure and temperature distribution characteristics of epoxypropane(PO)with different types and contents of metal powders were experimentally studied using a 20 L spherical liquid explosion test system.The temperature field of explosion flame was reconstructed by the colorimetric temperature measurement method with a high-speed camera,which is based on the gray-body radiation theory and a self-written python code.The tungsten lamp was used to calibrate the measuring accuracy of the temperature mapping system,and the fitting relationship between the temperatures and the gray values of the high-speed images is derived to obtain the conversion coefficient.The experimental results show that the optimal mass concentration of pure PO was 780 g/m^(3),both the explosion overpressure(Δp_(max))and the explosion pressure rise rate((dp/dt)max)reached the maximum,Δp_(max)=0.799 MPa and(dp/dt)_(max)=52.438 MPa/s,respectively.The maximum explosion overpressure,maximum explosion pressure rise rate and maximum average temperature of PO added with Al,Ti and Mg powders all increase with the increase of mass ratios(I),while the trend of maximum pressure rise time is opposite.The variation rules of the maximum explosion overpressure and maximum average temperature are consistent,the order of their values is:Al/PO,Mg/PO,Ti/PO.When I=40%,the maximum explosion overpressure value of the three solid-liquid mixed fuels increases by 12.00%,8.41%and 11.54%,respectively,compared with pure PO.In addition,the variation rules of the maximum explosion pressure rise rate and the combustion rate are consistent,the order of their values is:Al/PO,Mg/PO,Ti/PO.When I=40%,the maximum explosion pressure rise rate value of the three solid-liquid mixed fuels increases by 41.91%,39.60%and 45.29%,respectively,compared with the pure PO.The results indicate that different high-energy metal powders have varied advantages in improving the explosion performance of PO,so metal powders should be appropriately selected as energetic additives according to the damage performance index in the formulation design of FAE.
作者
张蓓蓓
程扬帆
蒋八运
沈兆武
甘小红
ZHANG Beibei;CHENG Yangfan;JIANG Bayun;SHEN Zhaowu;GAN Xiaohong(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,Anhui,China;Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,Anhui,China;Huainan Wanhuai Electromechanical Co.,Ltd.,Huainan 232001,Anhui,China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2024年第10期123-135,共13页
Explosion and Shock Waves
基金
国家自然科学基金(12272001)
安徽省高校自然科学基金杰青项目(2023AH020026)。
关键词
燃料空气炸药
环氧丙烷
金属粉
固-液混合燃料
毁伤性能
比色测温
fuel air explosive
epoxypropane
metal powders
solid-liquid mixed fuels
damage performance
colorimetric temperature measurement
