Abstract
It is important for a fire suppression system to keep the target concentration in all regions of a protected room. In this study, the effects of aspect ratio of the protected region, position and area of the pressure relief port, area of an obstacle in the protected region and the number of nozzles on the mixing process of gaseous suppressant are investigated by large eddy simulation, Besides, the evaluation method of the mixing condition is discussed. The results show that the gaseous suppressant is insufficiently mixed when the aspect ratio of the protected region is large and that the mixing condition can be evaluated by the ratio of the target concentration attainment.
Original language | English |
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Pages (from-to) | 2569-2576 |
Number of pages | 8 |
Journal | Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
Volume | 69 |
Issue number | 688 |
DOIs | |
Publication status | Published - 2003 Dec |
Externally published | Yes |
Keywords
- Computational Fluid Dynamics
- Diffusion
- Gaseous Suppression System
- Large Eddy Simulation
- Mixing process
- Turbulent Flow
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering