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作者机构：School of Chemical EngineeringNanjing University of Science and TechnologyNanjingJiangsu210094PR China Xian Modern Chemistry Research InstituteXianShaanxi710065PR China China Research and Development Academy of Machinery EquipmentBeijing100089PR China
出 版 物：《Defence Technology（防务技术）》 (Defence Technology)
年 卷 期：2021年第17卷第3期
页 面：785-791页
核心收录：
学科分类：082604[工学-军事化学与烟火技术] 08[工学] 0826[工学-兵器科学与技术]
主 题：Fuel air explosive Aluminum powder Boron Magnesium hydride Explosion performance
摘 要：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 *** 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 1700C, 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.
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