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| NEPE推进剂激光点火特性 |
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李疏芬1,2, 牛和林1,2, 张钢锤3,4, 王华3,4, 魏剑维3,4, 马喜梅3,4
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1.中国科学技术大学化学物理系;2.安徽合肥230026;3.陕西动力机械研究所;4.陕西动力机械研究所 陕西西安710025
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| 摘要: |
| 采用CO2 激光点火系统 ,研究常压下NEPE推进剂中AP在点火过程中的作用 ,以及AP的表面积、燃速催化剂、初温、热流密度等因素与点火延迟时间的关系。结果表明 :与HMX相比 ,AP是缩短点火延迟时间的主要因素 ;初温对点火延迟时间的影响程度取决于热流量的大小 ,存在着所谓的“拉平效应”。而降低AP粒度 ,提高AP表面积 ,在初温大于 15℃时 ,有利于缩短点火延迟时间 ,而在小于 15℃时则相反 ;适当的添加燃速催化剂也有利于缩短点火延迟时间 |
| 关键词: 硝胺推进剂 推进剂点火 激光点火 点火延迟 |
| DOI： |
| 分类号:V512 |
| 基金项目:国家自然科学基金资助项目 ( 5 97860 0 5 ) |
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| Laser ignition of NEPE propellant |
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LI Shu fen,NIU He lin,ZHANG Gang chui,WANG Hua,WEI Jian wei,MA Xi mei
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1.Dept. of Chemical Physics,China Univ. of Science and Technology,Hefei 230026, China;2.Shaanxi Inst. of Power Machinery, Xi’an 710025, China
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| Abstract: |
| The effect of surface area of ammonium perchlorate(AP), initial temperature, heat fluxes and catalyst on the ignition delay time of NEPE propellant, which is a special nitromine composite propellant was examined in detail within a CO 2 laser ignition system. The results show that AP acts as a kind of trigger during ignition and is of more importance than HMX. There exists laser ignition thresholds, and the effect of initial temperature on ignition delay time is influenced by heat fluxes. This effect is more significant at lower heat fluxes. The large AP surface area benefits the decrease of ignition delay time when the initial temperature is higher than 15℃, while this effect will be realized by the relatively small AP surface area below 15℃. The addition of an effective catalyst can also shorten the ignition delay time by decreasing the reaction activation energy. |
| Key words: Nitramine propellant Propellant ignition Laser ignition Ignition delay |
