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铝颗粒的燃烧细节决定着推进剂的性能。应用Fick第一定律及Fourier定律,对燃烧颗粒中各组分气体的质量与能量扩散过程进行计算,跟踪氧化反应中生成的中间态产物,总结了颗粒尺寸及组分随燃烧时间的变化规律,以及颗粒的燃烧效率等。结果表明,颗粒燃烧初期,反应进行的较为强烈,约60ms后,燃烧趋于平稳,最终,颗粒20%以上的外表面被氧化物所覆盖。
The burning details of the aluminum particles determine the performance of the propellant. The Fick’s first law and the Fourier law were used to calculate the mass and energy diffusion processes of each component gas in the combustion particles. The intermediate products generated during the oxidation reaction were tracked. The variation of particle size and composition with combustion time were summarized, As well as the combustion efficiency of the particles. The results showed that the reaction proceeded strongly during the early stage of combustion. After about 60 ms, the combustion tended to be stable. Finally, the outer surface of the particles with more than 20% was covered with oxide.