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综述了固体推进剂铝团聚研究进展,对现有研究中存在的局限性进行了讨论,并分析了未来团聚模型的趋势.铝团聚物理过程可抽象为堆积、聚集和团聚3个阶段.现有团聚模型可分为5类,分别是经验模型、口袋模型、物理模型、随机装填模型和凝相边界层模型.目前缺乏高精度、宽适用性的模型来准确预测铝的团聚过程.团聚模型未来发展的趋势应具备能够预测团聚物粒度分布和计算量小两大优势.由于能描述团聚过程的本质,物理模型具有很好的研究前景.开展了5MPa下含铝推进剂燃烧实验,采用高速显微拍摄技术获得推进剂燃面处铝颗粒的团聚直径,与Hermsen模型和Salita模型预测数据进行了比较,对于燃速分别为5.1mm/s和8.0mm/s的推进剂,Salita模型对于团聚直径的预示误差分别为8.7%和9.6%,而Hermsen模型对于高燃速推进剂的预示误差为19.2%.总体看来,Salita模型预示精度更为合理.
The progress of solid agglomeration aluminum agglomeration is reviewed, the existing limitations of the existing research are discussed, and the trend of agglomeration model in the future is analyzed.The aluminum agglomeration physical process can be abstracted into three stages of accumulation, aggregation and reunion The agglomeration models can be divided into five categories, which are the empirical model, the pocket model, the physical model, the random loading model and the condensate boundary layer model. Currently, there is a lack of high precision and wide applicability model to accurately predict the aluminum agglomeration process. The trend of development should be able to predict the aggregate size distribution and the amount of computing two small advantages.Because of the nature of the process can describe the reunion, the physical model has a good research prospects.Aluminum propellants combustion experiment carried out at 5MPa, using high-speed display Microaggregation technique was used to obtain the agglomeration diameter of aluminum particles on the combustion surface of propellant. Comparisons were made with the Hermsen model and Salita model. For the propellants with burning rates of 5.1 mm / s and 8.0 mm / s, respectively, Of the predictive errors were 8.7% and 9.6%, respectively, while the Hermsen model for the high rate of fire propellant prediction error of 19.2%. Overall, the Salita model predicts more accuracy reasonable.