火炸药学报2016，Vol.39Issue(1)：43-47,5.DOI:10.14077/j.issn.1007-7812.2016.01.007
金属/AP颗粒混合物燃烧特性的光谱分析
Analysis on the Combustion Characteristics of Metal/AP Mixtures by Using Emission Spectroscopy
摘要
Abstract
In order to maximize density specific impulse of the Al/AP bipropellant powder rocket engine,the fire tests on Al/AP powder rocket engine were carried out with increasing the characteristic length of combustion chamber from 2.31 m to 12.62 m. Combustion performances of Al/AP mixtures such as ignition delay,burn time,combustion smoothness and intensity of vapor phase reaction in nitrogen under atmospheric pressure were studied by using spectrometer,CCD camera and CO2 laser igniter.Ap-parent packing densities of samples were measured.As an alternative fuel,the magnesium particles were also studied.The results show that,increasing chamber characteristic length from 2.31 m to 12.62 m produces smoother combustion with ±2.43% maxi-mum amplitude of chamber pressure oscillation.Flame of Al/AP mixture with 1μm Al particles is much more luminous than that with 10μm Al particles.And the continuous emission signal intensity of Al/AP mixture with 1μm Al particles at 568 nm exceeds the upper limit (65 000 counts)of the spectrometer,rather than Al/AP mixture with 10μm Al particles with continuous intervals among combustion process and lower emission signal intensity at 568nm of below 19 036 counts.Ignition delay and burn time of 10μm Al particles are 3.65 times and 3.03 times as 1μm Al particles,respectively.But the maximumRAlO and packing density are 14.3% and 21.3% less than 1μm Al powder,showing that smaller Al particles have better combustion performance but lower packing density.Although the theoretical specific impulse of the Mg/AP propellant is 95.6%of the Al/AP,its bulk density is 8%higher than 1μm Al powder,and the ignition delay is 90.3%shorter than 10μm particles.Flame images also show that magnesium can largely reduce the condensed phase deposition.关键词
分析化学/发射光谱/燃烧特性/激光点火/金属颗粒Key words
analytical chemistry/emission spectroscopy/combustion characteristics/laser ignition/metal particle分类
军事科技引用本文复制引用
邓哲,胡春波,杨建刚,朱小飞,蔡玉鹏..金属/AP颗粒混合物燃烧特性的光谱分析[J].火炸药学报,2016,39(1):43-47,5.基金项目
National Natural Science Foundation of China (51266013) （51266013）
Foundation of Northwestern Polytechnical University for Basic Research (JC20110205). （JC20110205）
