scholarly journals A Study on Analyzing the Operation Time of the Sprinkler Head near the Beam with Fire Simulation

2020 ◽  
Vol 20 (1) ◽  
pp. 265-272
Author(s):  
Daehyun Choi ◽  
Jaemoon Lee ◽  
Sehong Min
Keyword(s):  
Operation Time ◽  
Fire Dynamics ◽  
Fire Dynamics Simulator ◽  
Fire Extinguishing ◽  
Parking Lot ◽  
Simulated Case ◽  
Sprinkler Head ◽  
Fire Information ◽  
Current Standards ◽  
Fire Outbreak

In this study, the dangers surrounding vehicular fires were identified by means of statistical analysis of the national fire information system. The analysis was conducted on the operation time of the sprinkler fire extinguisher, which plays the most essential role during the initial fire extinguishing attempt, in case of a fire outbreak. A simulation was created using the application guidelines pertaining to a sprinkler head located close to a beam as provided in NFSC 103. The operation time of the sprinkler head was analyzed for the case of a parking lot fire where a fan was operated. Fire Dynamics Simulator was used as the simulation program. If the revised guidelines were applied to thesimulation, the sprinkler head located directly above the fire source was activated approximately 1 minin advance compared to the sprinkler head operating under current standards. Therefore, it was found that the revised guidelines were suitable and aided in early fire extinguishing attempts. In the case where a fan was operated along with the detector, during the outbreak of a fire, it was found that the operation of the sprinkler head located directly above the fire was delayed by two or more minutes compared to the simulated case where no fan was operated.

Numerical Modeling of Fire Dynamic Behavior for a Five-Story Building

2013 ◽  
Vol 365-366 ◽  
pp. 145-149 ◽  
Author(s):  
Cherng Shing Lin ◽  
Te Chi Chen
Keyword(s):  
Numerical Modeling ◽  
Dynamic Behavior ◽  
Fire Dynamics ◽  
Fire Dynamics Simulator ◽  
Smoke Particles ◽  
Fire Extinguishing ◽  
Toxic Gases ◽  
Initial Location ◽  
Story Building ◽  
Fire Accident

This study is based on a real fire accident that occurred in Keelung City, Taiwan. The fire site was situated in an old five-story building that was renovated for recreational purposes. When the fire broke out, a stack effect formed instantly because the fire source was gasoline, the initial location of the fire was the stairway, and the fire burned rapidly with a cut-off downward evacuation exit. Customers were unfamiliar with the escape routes and fire-extinguishing equipment, leading to the loss of five lives. This study applies the Fire Dynamics Simulator (FDS) to develop a computer numerical model and simulate the actual conditions of the fire accident. The major fire dynamic behavior parameters are computed to evaluate the transport of flames, smoke particles, and toxic gases within the enclosed building. Recommendations for fire safety in this type of architectural structure are provided to reduce the reoccurrence of similar disasters.

Assessment of Fire Dynamics Simulator for Heat Flux and Flame Heights Predictions from Fires in SBI Tests

2008 ◽  
Vol 46 (2) ◽  
pp. 291-306 ◽  
Author(s):  
Jianping Zhang ◽  
Michael Delichatsios ◽  
Matthieu Colobert
Keyword(s):  
Heat Flux ◽  
Fire Dynamics ◽  
Fire Dynamics Simulator

An evaluation of fire-plume properties simulated with the Fire Dynamics Simulator (FDS) and the Clark coupled wildfire model

2006 ◽  
Vol 36 (11) ◽  
pp. 2894-2908 ◽  
Author(s):  
Ruiyu Sun ◽  
Mary Ann Jenkins ◽  
Steven K Krueger ◽  
William Mell ◽  
Joseph J Charney
Keyword(s):  
Fluid Dynamics ◽  
Data Sets ◽  
Fire Plume ◽  
Fire Dynamics ◽  
Fire Model ◽  
Fire Dynamics Simulator ◽  
Physically Based ◽  
Vertical Grid ◽  
Simplifying Assumptions ◽  
Good Agreement

Before using a fluid dynamics physically based wildfire model to study wildfire, validation is necessary and model results need to be systematically and objectively analyzed and compared to real fires, which requires suitable data sets. Observational data from the Meteotron experiment are used to evaluate the fire-plume properties simulated by two fluid dynamics numerical wildfire models, the Fire Dynamics Simulator (FDS) and the Clark coupled atmosphere–fire model. Comparisons based on classical plume theory between numerical model and experimental Meteotron results show that plume theory, because of its simplifying assumptions, is a fair but restricted rendition of important plume-averaged properties. The study indicates that the FDS, an explicit and computationally demanding model, produces good agreement with the Meteotron results even at a relatively coarse horizontal grid size of 4 m for the FDS, while the coupled atmosphere–fire model, a less explicit and less computationally demanding model, can produce good agreement, but that the agreement is sensitive to surface vertical-grid sizes and the method by which the energy released from the fire is put into the atmosphere.

Numerical Analysis of Evacuation from Taiwan Hsuehshan Tunnel Fire

2014 ◽  
Vol 955-959 ◽  
pp. 1840-1849
Author(s):  
Cherng Shing Lin ◽  
Kuo Da Chou
Keyword(s):  
Numerical Simulation ◽  
Fire Protection ◽  
Quantitative Data ◽  
Relevant Information ◽  
Simulation Software ◽  
Escape Time ◽  
Fire Dynamics ◽  
Fire Dynamics Simulator ◽  
Tunnel Fire ◽  
Protection Engineering

Taiwan is an island nation with numerous mountains and few plains. Consequently, the number of tunnel projects has gradually increased and tunnels are becoming longer. Because the number of large tunnels that exceed 1000 meters in length has increased, the effective escape and evacuation of people during a fire and the minimization of injury are crucial to fire protection engineers. For this study, an actual example of a fire that occurred in Hsuehshan Tunnel (12.9 kilometers and the longest tunnel in Southeast Asia) was used. A fire dynamics simulator (FDS) including numerical simulation software was applied to analyze this fire and the relevant information that was collected was compared and verified. The fire site simulation showed the escape and evacuation of people during the fire. Simulations of the original fire site and the possible escape time for people with various attributes were discussed to provide quantitative data and recommendations based on the analysis results, which can serve as a reference for fire protection engineering.

scholarly journals Risco de incêndio numa fossa de resíduos sólidos

2011 ◽  
pp. 263-269
Author(s):  
Emanuel Ferreira ◽  
João Paulo C. Rodrigues ◽  
Leça Coelho
Keyword(s):  
Fire Dynamics ◽  
Fire Dynamics Simulator ◽  
Smoke Transport

Neste artigo é analisado o risco de incêndio numa instalação de tratamento de resíduos sólidos urbanos, nomeadamente ao nível da sua fossa de deposição desses resíduos. Foram realizadas simulações do desenvolvimento do incêndio usando um modelo de duas zonas, o Consolidated Model of Fire and Smoke Transport (CFAST) e um modelo de campo, o Fire Dynamics Simulator and Smokeview (FDS-SMV), ambos do National Institute of Standards and Technology (NIST), sendo os resultados analisados e discutidos.

Assessment of the Fire Dynamics Simulator for Modeling Fire Suppression in Engine Rooms of Ships with Low-Pressure Water Mist

2019 ◽  
Vol 56 (3) ◽  
pp. 1315-1352 ◽  
Author(s):  
Roberto Bellas ◽  
Miguel A. Gómez ◽  
Arturo González-Gil ◽  
Jacobo Porteiro ◽  
José L. Míguez
Keyword(s):  
Fire Suppression ◽  
Low Pressure ◽  
Water Mist ◽  
Fire Dynamics ◽  
Fire Dynamics Simulator ◽  
Pressure Water

BLEVE fireball modeling using Fire Dynamics Simulator (FDS) in an Algerian gas industry

2018 ◽  
Vol 54 ◽  
pp. 69-84 ◽  
Author(s):  
Ilyas Sellami ◽  
Brady Manescau ◽  
Khaled Chetehouna ◽  
Charles de Izarra ◽  
Rachid Nait-Said ◽  
...  
Keyword(s):  
Fire Dynamics ◽  
Gas Industry ◽  
Fire Dynamics Simulator

scholarly journals A Numerical Analysis of the Fire Characteristics after Sprinkler Activation in the Compartment Fire

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3099 ◽  
Author(s):  
Ho Trong Khoat ◽  
Ji Tea Kim ◽  
Tran Dang Quoc ◽  
Ji Hyun Kwark ◽  
Hong Sun Ryou
Keyword(s):  
Experimental Data ◽  
Numerical Analysis ◽  
Fire Suppression ◽  
Compartment Fire ◽  
Fire Dynamics ◽  
Fire Dynamics Simulator ◽  
Safety Design ◽  
Smoke Layer ◽  
Fire Characteristics ◽  
Sprinkler Spray

Understanding fire characteristics under sprinkler spray is valuable for performance-based safety design. However, fire characteristics during fire suppression by sprinkler spray has seldom been studied in detail. In order to present a fire suppression model by sprinkler spray and determine the fire characteristics after sprinkler activation in a compartment, a numerical analysis was conducted using a fire dynamics simulator (FDS). A simple fire suppression model by sprinkler spray was calibrated by comparing ceiling temperatures from experimental data. An extinguishing coefficient of 3.0 was shown to be suitable for the fire suppression model. The effect of sprinkler spray on the smoke layer during fire suppression was explained, revealing a smoke logging phenomenon. In addition, the smoke, which spread under the influence of the sprinkler spray, was also investigated. The temperature, velocity, and mass flow rate of the smoke layer through the doorway was significantly reduced during fire suppression compared to a free burn case.

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