| Citation: | CHEN Binbin, DUAN Lian, YANG Gan, et al. Combustion process of agglomerated boron particles at 0.1—1.0 MPa atmospheric pressure[J]. Journal of Aerospace Power, 2025, 40（9）：20240817 doi: 10.13224/j.cnki.jasp.20240817
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In order to elucidate the combustion characteristics of agglomerated boron particles in a pressurized environment, a laser ignition experimental system was employed to investigate the ignition and combustion process of agglomerated boron particles with an average particle size of approximately 350 μm within the pressure range of 0.1—1.0 MPa. The experimental findings demonstrated that within 15 ms of laser heating, there was a more pronounced emission peak for BO2 and higher particle surface temperatures in environments with elevated pressures. However, after 15 ms from initiating laser heating in high-pressure environments, smoke generated by boron oxide covered the outer surface of aggregated boron particles, thereby influencing their energy release process and reducing their surface temperatures. As ambient pressure increased from 0.2 MPa to 1.0 MPa, the average self-sustaining combustion time also increased from 191 ms to 547 ms. This contributed to understanding of the energy release process of boron particles in pressurized environments, so it showed practical significance for optimizing formula design for propellants containing boron and enhancing the combustion structure for ramjets utilizing boron.
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