| Citation: | TU Chengyin, ZHUANG Yuqian, LI Yingkun, et al. Combustion process and aluminum agglomeration characteristics of NEPE propellant[J]. Journal of Aerospace Power, 2023, 38（11）：2791-2798 doi: 10.13224/j.cnki.jasp.20220229
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In order to study the combustion process and aluminum agglomeration characteristics of NEPE propellant, the combustion process of NEPE propellant was recorded by the optical imaging method combined with a high-speed camera and a long distance microscope, the combustion wave flame was recorded by an infrared thermal imager, and the condensed combustion products of the propellant were collected to analyze by scanning electron microscope (SEM) and laser particle size analyzer. Results showed that the splash phenomenon of aluminum agglomerates existed in five combustion stages: initial ignition, flame diffusion, steady combustion, flame attenuation and flame extinction. At the pressure range of 0.5—2.0 MPa, with the increase of environmental pressure, the high temperature combustion region increased, the number of aluminum agglomeration at the burning surface increased, and the particle size of aluminum agglomeration gradually decreased. The condensed combustion products were mainly divided into aluminum agglomerates and oxide particles. The particle size of aluminum agglomerates was within the range of 50—600 μm, and the particle size of alumina particles usually less than 1 μm.
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