Numerical Simulation of Mixing Process of Gaseous Suppressant

Nobuyoshi Kawabata; Takuji Ishikawa; Yusuke Naito; Youichiro Matsumoto; Naoshi Saito; Takashi Tsuruda

doi:10.1299/kikaib.69.2569

Numerical Simulation of Mixing Process of Gaseous Suppressant

Nobuyoshi Kawabata, Takuji Ishikawa, Yusuke Naito, Youichiro Matsumoto, Naoshi Saito, Takashi Tsuruda

Research output: Contribution to journal › Article › peer-review

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
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	https://doi.org/10.1299/kikaib.69.2569
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

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10.1299/kikaib.69.2569

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Numerical Simulation of Mixing Process of Gaseous Suppressant. / Kawabata, Nobuyoshi; Ishikawa, Takuji; Naito, Yusuke; Matsumoto, Youichiro; Saito, Naoshi; Tsuruda, Takashi.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 69, No. 688, 12.2003, p. 2569-2576.

Research output: Contribution to journal › Article › peer-review

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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.",

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AU - Kawabata, Nobuyoshi

AU - Ishikawa, Takuji

AU - Naito, Yusuke

AU - Matsumoto, Youichiro

AU - Saito, Naoshi

AU - Tsuruda, Takashi

PY - 2003/12

Y1 - 2003/12

N2 - 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.

AB - 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.

KW - Computational Fluid Dynamics

KW - Diffusion

KW - Gaseous Suppression System

KW - Large Eddy Simulation

KW - Mixing process

KW - Turbulent Flow

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Numerical Simulation of Mixing Process of Gaseous Suppressant

Abstract

Keywords

ASJC Scopus subject areas

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