火炸药学报2017，Vol.40Issue(3)：36-40,5.DOI:10.14077/j.issn.1007-7812.2017.03.006
不同气氛对铝粉点火燃烧特性的影响分析
Analysis of the Influence of Different Atmospheres on the Characteristics of Ignition and Combustion of Aluminum Powder
摘要
Abstract
To study the improving effect of fluidization gas on the performances of ignition and combustion for powder propellant, the characteristics of ignition and combustion for aluminum powder were investigated under different atmosphere conditions using the experimental method of CO2 laser igniter coupled with fiber optic spectrometer.The ignition temperature of aluminum powder under different atmospheres were calculated by measuring temperature method of fitting the spectral signal.The results show that the ignition delay of aluminum powder with the size of 1μm under N2O and air atmosphere is 10 and 359ms, respectively, and the transition time from successful ignition to full combustion is 829 and 1579ms, respectively, indicating that the heterogeneous reaction rate of aluminum surface in ignition stage and combustion stage is faster in N2O than in air.The ignition temperature of aluminum powder with the size of 1μm in N2O and air is 1550-1650 and 1450-1500K, respectively, which are almost the same, but they are obviously lower than the ignition temperature of 2300K of millimeter level aluminum powder, indicating that the particle size has an important effect on the ignition temperature of aluminum powder.关键词
粉末火箭发动机/流化气/点火延迟/点火温度/铝粉Key words
powder rocket motor/fluidization gas/ignition delay/ignition temperature/aluminum powder分类
军事科技引用本文复制引用
杨建刚,胡春波,邓哲,朱小飞..不同气氛对铝粉点火燃烧特性的影响分析[J].火炸药学报,2017,40(3):36-40,5.基金项目
国家自然科学基金(No.51576166) （No.51576166）
