Experimental and numerical study on ignition and combustion characteristics of boron-magnesium composite powders--颗粒学报PARTICUOLOGY

Liu, S., Han, L., Liu, H., Song, Y., Liu, L., & Hu, S. (2024). Experimental and numerical study on ignition and combustion characteristics of boron-magnesium composite powders. Particuology, 84, 12-29. https://doi.org/10.1016/j.partic.2023.02.012

Experimental and numerical study on ignition and combustion characteristics of boron-magnesium composite powders

Shuyuan Liu^a, Luyang Han^a, Hongmei Liu^{b *}, Yingkai Song^{c d *}, Linlin Liu^a, Songqi Hu^a

a Science and Technology on Combustion, Internal Flow and Thermo-Structure Laboratory, Northwestern Polytechnical University, Xi’an, 710072, China
b School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou, 213164, China
c Shanghai Institute of Space Propulsion, Shanghai, 201112, China d Shanghai Engineering Research Center of Space Engine, Shanghai, 201112, China

10.1016/j.partic.2023.02.012

Volume 84, January 2024, Pages 12-29

Received 14 October 2022, Revised 21 December 2022, Accepted 8 February 2023, Available online 3 March 2023, Version of Record 21 March 2023.

E-mail: liuhm@cczu.edu.cn; songyingkai0707@163.com

Highlights

• Developed and validated ignition model for boron-magnesium (BM) powders with Mg inhibiting effect.

• Revealed H₂O, O₂, Mg content and pressure effects on ignition and combustion time.

• A critical O₂ content exists above which combustion time decreases with O₂ content.

• There is a trade-off between ignition and combustion performance of BM powders.

Abstract

A high-pressure laser ignition and combustion system with adjustable oxidizer gas atmosphere is established to investigate the ignition and combustion characteristics of boron-magnesium (BM) composite powders. An ignition and combustion model of BM powders is established and validated in the present study. The results show that increasing water content, O₂ content and Mg content all result in shorter ignition delay time of BM powders, among which the effect of water content is the most obvious. However, ignition delay time increases as pressure increases. The combustion time decreases with increasing Mg content and ambient pressure but increases with water content. With the increase of O₂ content, combustion time of BM powders first increases and then decreases, which means a critical O₂ content exists above which combustion time decreases. The results show that there exists a trade-off between ignition and combustion performance of BM composite powders.

Graphical abstract

Keywords

Boron magnesium powder; Laser ignition; Ignition and combustion model; Reaction mechanism; Numerical model

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