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Lookup NU author(s): Bin Zhang, Dr Li Chen, Ruiqi Wang, Dr Kayvan Pazouki
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
To effectively mitigate hydrogen-methane-air deflagrations in semi-confined space, we propose a Localized Water Mist (LWM) method. The results demonstrate that when the 8-μm LWM is sprayed near the igniter, the flame velocity and overpressure decrease by 38.8 % and 30.1 %, respectively. However, the 45-μm LWM exhibits enhanced effect. When the 45-μm LWM is sprayed near the obstacle, it shows superior deflagration mitigation capabilities. Reciprocally, the 8-μm LWM has few mitigation effect. Subsequently, the deflagration mitigation mechanism of LWM is analyzed. The small-diameter LWM has large surface area, sufficient interaction with the flame surface and minimal turbulence interference near the igniter. In contrast, large-diameter LWM is broken into small-size particles by the shock wave near the obstacle, which are able to enter vortex flames absorbing heat quickly. Additionally, vaporized WM mitigates deflagration by reducing the generation rate of the main radicals (OH, H, and O) through reactions R1, R3, R50, R86, R119, and R120.
Author(s): Xia Y, Zhang J, Zhang B, Wang B, Chen L, Wang R, Shi J, Wu W, Pazouki K
Publication type: Article
Publication status: Published
Journal: International Journal of Hydrogen Energy
Year: 2024
Volume: 50
Issue: Part A
Pages: 1458-1469
Print publication date: 02/01/2024
Online publication date: 20/11/2023
Acceptance date: 10/11/2023
Date deposited: 22/11/2023
ISSN (print): 0360-3199
ISSN (electronic): 1879-3487
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.ijhydene.2023.11.129
DOI: 10.1016/j.ijhydene.2023.11.129
ePrints DOI: 10.57711/tggm-gt50
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