On the Large Eddy Simulation Modelling of Water Suppression Systems Droplet Impact and Coverage Area

Ivan Miguel De Cachinho Cordeiro; Hengrui Liu; Anthony Chun Yin Yuen; Timothy Bo Yuan Chen; Ao Li; Cheng Wang; Ruifeng Cao; Guan Heng Yeoh

doi:10.3390/fire5050165

Fire (Oct 2022)

On the Large Eddy Simulation Modelling of Water Suppression Systems Droplet Impact and Coverage Area

Ivan Miguel De Cachinho Cordeiro,
Hengrui Liu,
Anthony Chun Yin Yuen,
Timothy Bo Yuan Chen,
Ao Li,
Cheng Wang,
Ruifeng Cao,
Guan Heng Yeoh

Affiliations

Ivan Miguel De Cachinho Cordeiro: School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Hengrui Liu: School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Anthony Chun Yin Yuen: School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Timothy Bo Yuan Chen: School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Ao Li: School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Cheng Wang: School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Ruifeng Cao: Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China
Guan Heng Yeoh: School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia

DOI: https://doi.org/10.3390/fire5050165
Journal volume & issue: Vol. 5, no. 5
p. 165

Abstract

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In this article, a collective database from validated numerical simulation has been established to study the suppression effects of water-based suppression systems under a single-compartment fire scenario at various suppression configurations and fire locations. Five fuel locations along the axis between the centre and corner of the room were configurated to dynamically analyse how the horizontal distance between the nozzle and fuel pan affects the heat release rate (HRR), temperature cooling phenomena at different heights and also the velocity profile. Throughout the fuel pan relocations, the water-mist system has achieved an average suppression time of 25 s for all the locations, it was found that the water mist system can effectively control the fire under 200 °C that is distanced over 2 m spanwise displacement from the nozzle against the fire, while the sprinkler has exhibited an excellent fuel surface cooling effect due to large momentum and heat capacity within the coverage area with an average suppression time of 50 s. The results of this study have further explored the spray coverage and droplet penetrability of different suppression systems at different locations corresponding to the fire source, and the quantitative assessment of fuel locations could also contribute to the future development of performance-based fire safety designs.

Published in Fire

ISSN: 2571-6255 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Physics
Website: https://www.mdpi.com/journal/fire

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