Ignition and combustion of boron particles at one to ten standard atmosphere

Wen Ao, Weijuan Yang, Yang Wang, Junhu Zhou, Jianzhong Liu, Kefa Cen

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

The ignition and combustion of boron particles are investigated at high pressures in the range of 1-10 atm. Observation results show that the combustion of 2 μm amorphous boron particles occurs in two continuous stages. The combustion times of boron particles are measured. The first stage combustion time decreases slightly with an increase of pressure, whereas the second stage combustion time shows strong dependence on pressure. Measured first stage combustion times are compared with the predictions of two typical numerical models, the King model and the Yeh and Kuo model. Both models overpredict the experimental data at higher pressures. The governing equations of the two models have been analyzed to reveal the reasons for the inaccuracy of the predictions. A new model has been developed on the basis of the Yeh and Kuo model, by introducing B(s) = 3/4O2(g) → 1/2B2O3(l) as the global reaction of B and O2. The prediction of the new model is in good agreement with experimental results, especially under high-pressure conditions. This study can bridge the gap between atmospheric pressure data and the higher-pressure data of previous work.

Original languageEnglish
Pages (from-to)760-764
Number of pages5
JournalJournal of Propulsion and Power
Volume30
Issue number3
DOIs
StatePublished - 2014
Externally publishedYes

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