Unsteady RANS modeling of water-spray suppression for large-scale compartment pool fires
- Authors
- Yoon, Sam S.; Kim, Ho Young; DesJardin, Paul E.; Hewson, John C.; Tieszen, Sheldon R.; Blanchat, Thomas K.
- Issue Date
- 2007
- Publisher
- BEGELL HOUSE INC
- Citation
- ATOMIZATION AND SPRAYS, v.17, no.1, pp.1 - 45
- Indexed
- SCIE
SCOPUS
- Journal Title
- ATOMIZATION AND SPRAYS
- Volume
- 17
- Number
- 1
- Start Page
- 1
- End Page
- 45
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/123090
- DOI
- 10.1615/AtomizSpr.v17.i1.10
- ISSN
- 1044-5110
- Abstract
- This paper presents a computational study of the effect of water-spray characteristics on the suppression of a large-scale (2 m x 2 m) JP-8 pool fire in a 10 m x 10 m x 10 m compartment with an open ceiling. The numerical model is based on an unsteady Reynolds-averaged Navier-Stokes formulation using a stochastic separated flow approach for the droplets that includes detailed descriptions of the interaction between water droplets and fire plume. Simulation results indicate that water-spray injection causes the gas temperature to rise due to the initial enhancement of the turbulent mixing. A threshold suppression condition is achieved when the injected droplet carries enough momentum (injection speed range is 20-80 m/s) to penetrate the fire plume and evaporate in the flame regions where most of the gas-phase combustion is taking place. In addition, the droplet size (ranging from 100-800 mu m) should be small enough to yield quick evaporation when in contact with the flame surface for efficient cooling. Based on a parametric study, a preferred fire suppression configuration is recommended for the systems considered.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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