添加纳米铝的高密度悬浮燃料点火性能  

Ignition Performance of High-Density Suspension Fuel of Adding Al NPs

作　　者：鄂秀天凤[1] 张磊[1] 谢君健 张香文[1] 徐胜利[2] 邹吉军[1] E Xiu-tian-feng;ZHANG Lei;XIE Jun-jian;ZHANG Xiang-wen;XU Sheng-li;ZOU Ji-jun(Key Laboratory for Advanced Fuel and Propellant of Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;School of Aerospace Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]天津大学化工学院先进燃料与化学推进剂教育部重点实验室,天津300072 [2]清华大学航天航空学院,北京100074

出　　处：《含能材料》2018年第4期290-296,共7页Chinese Journal of Energetic Materials

基　　金：装备预研教育部联合项目(625010304)

摘　　要：为了探究含金属颗粒悬浮燃料的点火和燃烧特性,制备了含5%纳米铝颗粒(Al NPs)的HD-01和四环庚烷(QC)的高密度悬浮燃料,采用雾化激波管测试了两种悬浮燃料在不同压力和温度下的点火延时P,通过拟合计算得到了表观点火活化能,分析了悬浮燃料的点火燃烧机理,采用高速摄像机记录了点火燃烧的流场图像。结果表明,悬浮燃料静置4周后无颗粒聚沉现象;在0.05 MPa和0.1 MPa下、1450 K和1750 K内,Al NPs可使HD-01和QC燃料的点火延时缩短约50%,表观点火活化能由161.4 k J·mol^(^(-1))和120.3 k J·mol^(-1)分别降低至156.5 k J·mol^(-1)和112.8 k J·mol^(-1);推测燃烧机理为铝原子优先与O2反应生成O自由基,进而加速燃烧反应。此外,Al NPs能够完全燃烧并促进燃料燃烧过程中的能量释放。To study the ignition and combustion characteristics of suspended fuel containing metal particles,two kinds of high-density suspension fuels of HD-01 and quadricyclane(QC)with 5%aluminum nanoparticles(Al NPs)were prepared.The ignition delay of two kinds of suspended fuels at different pressure and temperature was measured by atomization shock tube.The apparent activation energy of ignition was obtained by fitting and calculating.The ignition and combustion mechanism of the suspension fuel were analyzed.The flow field images of ignition and combustion were recorded by high-speed camera.Results show that the suspended fuel can stand after 4 weeks without particle aggregation phenomenon;in the range of 0.05 MPa and 0.1 MPa,1450 K and 1750 K,Al NPs can make the ignition delay of HD-01 and QC fuel shorten by about 50%and the apparent ignition activation energy reduce from 161.4 kJ·mol-1 and 120.3 kJ·mol-1 to 156.5 kJ·mol-1 and 112.8 kJ·mol-1,respectively;Inferring that the combustion mechanism as that aluminum atoms preferentially react with O 2 to produce O radicals,thereby accelerating the combustion reaction.In addition,Al NPs can completely burn and promote the energy release during fuel combustion.

关 键 词：纳米铝颗粒 高密度燃料 悬浮燃料 激波管 点火延迟 燃烧 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]