Study on combustion characteristics of boron particles under flame interaction
Year: 2023
Type: article
Abstract: The combustion characteristics of the multiple boron particles with flame interaction are studied systemically. The governing equations with detailed chemical kinetics, condensation of B 2 O 3 and species transportation under different particle distance, size, ambient pressure and arrangement structure are simulated by means of laminar model. The simulation results show that the main heterogeneous reaction is 2B(s)+O 2 B 2 O 2 , and the main homogeneous reactions are BO + O 2 BO 2 +O and B 2 O 2 +O BO + BO 2 . The highest temperature appears at the particle surface and is mainly controlled by the heterogeneous reaction. The flame structure exhibits spherical shape. Under the conditions of particle spacing of 0.02 μm, 0.03 μm, 0.05 μm, 0.1 μm, 0.25 μm and 0.5 μm, no obvious increasing on the total heterogeneous reaction rate in the interaction zone occurs when the particle distance reaches more than or equal to 0.25 μm. When the spacing is less than or equal to 0.1 μm, the total heterogeneous reaction rate in the interaction zone increases significantly with the reduction of particle spacing. Increasing particle size can promote the temperature and particle combustion rate in the interaction zone. Higher ambient pressure increases the flame temperature. In multiple particle system, the combustion characteristics is similar to that in double particle system.
Source: Acta Astronautica
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,950
OpenAlex ID: W4366490445