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Spontaneous initiation and development of hydrogen-oxygen detonation with ozone sensitization
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Han, Wenhu, Liang, Wenkai, Wang, Cheng, Wen, Jennifer X. and Law, Chung K. (2021) Spontaneous initiation and development of hydrogen-oxygen detonation with ozone sensitization. Proceedings of the Combustion Institute, 38 (3). pp. 3575-3583. doi:10.1016/j.proci.2020.06.239 ISSN 1540-7489.
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Official URL: https://doi.org/10.1016/j.proci.2020.06.239
Abstract
This work studies numerically the spontaneous initiation and sustenance of a detonation wave from a hot spot with a nonuniform initial temperature embedded within an H2single bondO2 mixture with and without O3 addition. For the case with either no or just a small amount of O3 addition, a weak reaction wave is auto-ignited at the hot spot, accelerates and then transitions to a pulsating detonation, which propagates along the temperature gradient and quenches as it runs into the cold fresh mixture. However, with increasing O3 addition, the possibility of sustenance of a developing detonation within the gradient is significantly enhanced as it enters the cold mixture. Furthermore, the reduced induction time by O3 addition leads to earlier appearance of the spontaneous reaction wave and detonation formation in the cold mixture, demonstrating that quenching of the detonation is largely related to the instability property of the mixture because the shortened induction time reduces substantially the instability. It is also noted that, for 5%O3 addition, a low-temperature flame produced by the O3 reactions is present in front of the spontaneous reaction wave, inducing a local pressure wave, which facilitates spontaneous initiation and sustains the detonation entering the cold mixture. Moreover, O3 addition renders the critical temperature to induce the minimum spontaneous wave speed higher than the crossover temperature, while they are very close for the case without O3.
Item Type: | Journal Article | ||||||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Detonation waves, Combustion, Chemical reactions, Waves | ||||||||||||||||||
Journal or Publication Title: | Proceedings of the Combustion Institute | ||||||||||||||||||
Publisher: | Elsevier Inc. | ||||||||||||||||||
ISSN: | 1540-7489 | ||||||||||||||||||
Official Date: | 2021 | ||||||||||||||||||
Dates: |
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Volume: | 38 | ||||||||||||||||||
Number: | 3 | ||||||||||||||||||
Page Range: | pp. 3575-3583 | ||||||||||||||||||
DOI: | 10.1016/j.proci.2020.06.239 | ||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
Date of first compliant deposit: | 4 August 2020 | ||||||||||||||||||
Date of first compliant Open Access: | 26 September 2021 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
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