Effect of metal powders on explosion of fuel-air explosives with delayed secondary igniters
Effect of metal powders on explosion of fuel-air explosives with delayed secondary igniters
复制标题
金属粉末对延迟二次点火器燃油空气炸药爆炸的影响
DOI：
10.1016/j.dt.2020.05.010
复制
发表时间：
2021-04-27
影响因子：
5.1
通讯作者：
Xie, Li-feng
中科院分区：
文献类型：
--
作者：
Wang, Yong-xu;Liu, Yi;Xie, Li-feng
为了提高延迟二次点火燃料空气炸药（FAE）的能量水平，在以乙醚和硝酸异丙酯为主要成分的液体燃料中添加高能金属粉末。利用高速摄像、压力测试系统和红外热像仪等手段，研究了FAE中金属粉末的爆炸性能和反应机理。结果表明，与纯液体燃料相比，加入高能金属粉末后，混合物的冲击波超压、表面最高火球温度和高温持续时间均显著提高。液固混合燃料在各测点的超压值均高于纯液体燃料。而火球的最高温度高达1700摄氏度，比纯液体燃料还要高。用硼或氢化镁代替30%的铝粉后，混合物的冲击波压力进一步提高。硼的高燃烧热和氢化镁释放出的氢能有效地提高混合物的爆炸效果。硼对炸药爆炸性能的改善效果优于氢化镁。结果表明，在液体燃料中添加高能金属粉末可以有效地改善FAE的爆炸性能。(c)2021中国园艺学会。由Elsevier B. V.代表KeAi Communications Co.制作和托管。这是CC BY-NC-ND许可证下的开放获取文章（http：//creativecommons.org/licenses/by-nc-nd/4.0/）。
In order to improve the energy level of fuel air explosive(FAE) with delayed secondary igniters, high energetic metal powders were added to liquid fuels mainly composed of ether and isopropyl nitrate. Metal powders' explosive properties and reaction mechanisms in FAE were studied by high-speed video, pressure test system, and infrared thermal imager. The results show that compared with pure liquid fuels, the shock wave overpressure, maximum surface fireball temperature and high temperature duration of the mixture were significantly increased after adding high energetic metal powder. The overpressure values of the liquid-solid mixture at all measuring points were higher than that of the pure liquid fuels. And the maximum temperature of the fireball was up to 1700 degrees C, which was higher than that of the pure liquid fuels. After replacing 30% of aluminum powder with boron or magnesium hydride, the shock wave pressure of the mixture was further increased. The high heat of combustion of boron and the hydrogen released by magnesium hydride could effectively increase the blast effect of the mixture. The improvement of the explosion performance of boron was better than magnesium hydride. It shows that adding high energetic metal powder to liquid fuels can effectively improve the explosion performance of FAE. (c) 2021 China Ordnance Society. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).