Effect of metal powders on explosion of fuel-air explosives with delayed secondary igniters
| Autor: | Yongxu Wang, Bin Li, Qi-ming Xu, Yi Liu, Lifeng Xie |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Isopropyl nitrate Materials science Explosive material Hydrogen Magnesium hydride Computational Mechanics chemistry.chemical_element 02 engineering and technology Combustion 01 natural sciences Fuel air explosive 010305 fluids & plasmas chemistry.chemical_compound 020901 industrial engineering & automation 0103 physical sciences Boron Mechanical Engineering Metals and Alloys Aluminum powder Overpressure Explosion performance Military Science chemistry Chemical engineering Ceramics and Composites Metal powder |
| Zdroj: | Defence Technology, Vol 17, Iss 3, Pp 785-791 (2021) |
| ISSN: | 2214-9147 |
| Popis: | 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 °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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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