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在对铝粉氧化过程和单颗粒燃烧过程分析的基础上,总结了导致铝粉团聚的主要因素,讨论了不同因素对铝粉燃烧效率的影响规律。这些因素包括铝粉粒度及含量、氧化剂种类、氧化剂粒度及级配和环境压力。随着铝粉粒度和含量的提高,铝粉燃烧效率降低;而随着氧化剂热值的提高,气相区的温度随之提高,铝粉的燃烧效率相对较高。对细AP而言,随着粒度的增大,铝粉团聚尺寸下降,燃烧效率明显提高;但对于粗AP而言,其粒度对铝粉燃烧效率影响较小。随着压力的提高,铝粉燃烧效率提高,但对于不同推进剂体系,压力的作用程度不同,对于含粗粒度AP的推进剂或铝粉含量较高的推进剂,压力对铝粉燃烧效率的影响较明显。
Based on the analysis of the oxidation process of aluminum powder and the combustion process of single particles, the main factors leading to aluminum agglomeration are summarized, and the influence of different factors on the combustion efficiency of aluminum powder is discussed. These factors include the size and content of aluminum powder, the type of oxidant, the particle size and gradation of oxidant, and the pressure on the environment. As the particle size and content of aluminum powder increase, the combustion efficiency of aluminum powder decreases. With the increase of the calorific value of oxidant, the temperature of the gas phase region increases, and the combustion efficiency of aluminum powder is relatively high. For fine AP, with the increase of particle size, the agglomeration size of aluminum powder decreased and combustion efficiency increased obviously. However, for coarse AP, the particle size had little effect on the combustion efficiency of aluminum powder. As the pressure increases, the combustion efficiency of aluminum powder increases, but for different propellant systems, the pressure has a different degree of action. For propellants with coarse particle size AP or propellants with high aluminum content, the effect of pressure on the combustion efficiency of aluminum powder The impact is more obvious.