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Localized water mist method enabling superior premixed hydrogen-methane-air deflagration mitigation in semi-confined space

Lookup NU author(s): Bin Zhang, Dr Li Chen, Ruiqi Wang, Dr Kayvan Pazouki

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

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.

Publication metadata

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: 2023

Pages: epub ahead of print

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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