Particle burning behaviors of Al/AP propellant with high-speed digital off-axis holography

The behavior of aluminum particles during Al/AP propellant combustion is studied by 25 kHz high-speed digital off-axis holography and high-speed microscopic imaging. The advantage of off-axis holography is that the effects of the enveloping flame are suppressed, thereby, achieving better burning par...

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Bibliographic Details
Published in:Proceedings of the Combustion Institute 2021, Vol.38 (3), p.4401-4408
Main Authors: Wu, Yingchun, Lin, Zhiming, Zhuo, Zhu, Wu, Shixi, Zhou, Chongyang, Yao, Longchao, Ao, Wen, Wu, Xuecheng, Chen, Linghong, Cen, Kefa
Format: Article
Language:English
Subjects:
Aluminized propellant
Aluminum combustion
Micro-explosion
Off-axis holography
Oxide cap
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Summary:The behavior of aluminum particles during Al/AP propellant combustion is studied by 25 kHz high-speed digital off-axis holography and high-speed microscopic imaging. The advantage of off-axis holography is that the effects of the enveloping flame are suppressed, thereby, achieving better burning particle imaging. Three-dimensional dynamics of the aluminum particles from a series of time-resolved holograms are given in order to study the motion behaviors of particles during combustion. Typical processes, e.g., formation and change of the condensed phase products, micro-explosion behavior, and diameter ratio of enveloping flame and Al particle, are analyzed. This work provides a new 3D approach, that is, high-speed digital off-axis holographic imaging, for studying solid propellant combustion.
ISSN:1540-7489
1873-2704
DOI:10.1016/j.proci.2020.07.135