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Large-eddy simulation of a turbulent buoyant plume interacting with droplets

Large-eddy simulation of a turbulent buoyant plume interacting with droplets
Large-eddy simulation of a turbulent buoyant plume interacting with droplets
A dynamic large-eddy simulation methodology is applied to a simplified water-spray fire suppression system to investigate droplet effects on a buoyant gas flame. A hybrid Eulerian-Lagrangian approach is employed for the gas-liquid system. Dynamic subgrid models are included to capture the local and unsteady interactions between the two phases. The effectiveness of changing spray angles on combustion suppression has been investigated. The drag effects of droplets cause significant changes to the flow and flame structures. Dense droplets, in particular, can cut through the reaction zones, causing flame extinction. The high temperature regions associated with reaction zones are suppressed by the spray droplets in all cases.
9787302158943
103-106
Tsinghua University Press and Springer
Xia, J.
ab23d6f5-1c9b-4f1e-8d6a-47606c9429d7
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3
Kumar, S.
695e30ec-08ac-4ad7-9f6b-b18dc52bcd0b
Xia, J.
ab23d6f5-1c9b-4f1e-8d6a-47606c9429d7
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3
Kumar, S.
695e30ec-08ac-4ad7-9f6b-b18dc52bcd0b

Xia, J., Luo, K.H. and Kumar, S. (2007) Large-eddy simulation of a turbulent buoyant plume interacting with droplets. In New Trends in Fluid Mechanics Research. Tsinghua University Press and Springer. pp. 103-106 .

Record type: Conference or Workshop Item (Paper)

Abstract

A dynamic large-eddy simulation methodology is applied to a simplified water-spray fire suppression system to investigate droplet effects on a buoyant gas flame. A hybrid Eulerian-Lagrangian approach is employed for the gas-liquid system. Dynamic subgrid models are included to capture the local and unsteady interactions between the two phases. The effectiveness of changing spray angles on combustion suppression has been investigated. The drag effects of droplets cause significant changes to the flow and flame structures. Dense droplets, in particular, can cut through the reaction zones, causing flame extinction. The high temperature regions associated with reaction zones are suppressed by the spray droplets in all cases.

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More information

Published date: August 2007
Venue - Dates: 5th International Conference on Fluid Mechanics, Shanghai, China, 2007-08-14 - 2007-08-18

Identifiers

Local EPrints ID: 48571
URI: http://eprints.soton.ac.uk/id/eprint/48571
ISBN: 9787302158943
PURE UUID: 6cfc2f9c-b6a6-4cca-bc54-58c89ea012c3

Catalogue record

Date deposited: 01 Oct 2007
Last modified: 11 Dec 2021 16:49

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Contributors

Author: J. Xia
Author: K.H. Luo
Author: S. Kumar

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