The size distribution and morphology evolution of the initial agglomerates on the burning surface of aluminized composite propellants have a strong influence on the agglomeration mechanism and size of condensed products. However, most previous research has focused on the establishment of size prediction models, and research on other characteristics of initial agglomerates is still lacking. The characteristics of the size distribution and evolution of the morphology of the initial agglomerates are investigated in this study. Analysis of the size distribution of the initial agglomerates shows that the distribution is regular in the stable combustion stage, and the agglomerates in this stage show weak agglomeration. The morphologies of the initial agglomerates are found to comprise coral-like structures composed of small alumina particles with strong fluidity in Stage (a), in which the effect of accumulation is dominant. In Stage (b), the initial agglomerates exhibit a relatively stable form of a ‘spherical structure + coral-like bond’, and the effects of accumulation and combustion are in dynamic equilibrium. In Stage (c), the initial agglomerates are spherical with an oxidation cap, and this stage is dominated by combustion. Through analysis of the characteristics of the size distribution and morphology evolution of the initial agglomerates, the agglomeration mechanism of aluminum particles on the burning surface is further clarified, which provides the foundation for further research.

铝化复合推进剂燃烧表面初始团聚体的尺寸分布和形貌演变对团聚机理和凝聚产物的尺寸有很大影响。然而，以往的研究大多集中在尺寸预测模型的建立上，对初始团聚体其他特征的研究尚缺乏。本研究研究了初始团聚体的尺寸分布特征和形态演变。对初始团聚体粒径分布分析表明，稳定燃烧阶段分布规律，该阶段团聚体呈弱团聚。发现初始团聚体的形态包括由具有强流动性的小氧化铝颗粒组成的珊瑚状结构，在阶段 (a) 中，聚集效应占主导地位。在阶段(b)中，初始团聚体表现出相对稳定的“球形结构+珊瑚状键”，积累和燃烧的影响处于动态平衡。在阶段 (c) 中，初始团聚体是带有氧化帽的​​球形，该阶段以燃烧为主。通过对初始团聚体尺寸分布和形貌演化特征的分析，进一步阐明铝颗粒在燃烧表面的团聚机理，为进一步研究奠定基础。在阶段(b)中，初始团聚体表现出相对稳定的“球形结构+珊瑚状键”，积累和燃烧的影响处于动态平衡。在阶段 (c) 中，初始团聚体是带有氧化帽的​​球形，该阶段以燃烧为主。通过对初始团聚体尺寸分布和形貌演化特征的分析，进一步阐明铝颗粒在燃烧表面的团聚机理，为进一步研究奠定基础。在阶段(b)中，初始团聚体表现出相对稳定的“球形结构+珊瑚状键”，积累和燃烧的影响处于动态平衡。在阶段 (c) 中，初始团聚体是带有氧化帽的​​球形，该阶段以燃烧为主。通过对初始团聚体尺寸分布和形貌演化特征的分析，进一步阐明铝颗粒在燃烧表面的团聚机制，为进一步研究奠定基础。而这个阶段以燃烧为主。通过对初始团聚体尺寸分布和形貌演化特征的分析，进一步阐明铝颗粒在燃烧表面的团聚机理，为进一步研究奠定基础。而这个阶段以燃烧为主。通过对初始团聚体尺寸分布和形貌演化特征的分析，进一步阐明铝颗粒在燃烧表面的团聚机理，为进一步研究奠定基础。