Numerical Study on the Validity of Scaling Law for Compartment Fires

Ko, Gwon Hyun

doi:10.7731/kifse.2014.28.4.029

Cited by 4 publications

(2 citation statements)

References 7 publications

(5 reference statements)

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“…Prototype Model [3,5,6,8,[12][13][14][15][16][17][18][19][20][21][22][23][24][25] Simulation [24][25][26][27] Form of Architecture…”

Section: Research Trends and Error Rate Analysis Methodsmentioning

confidence: 99%

Case Study Analysis of Database Construction for Smoke Control Simulation Experiments Using Scale Model

Im¹,

Kim²,

Jeong³

et al. 2023

Int J Fire Sci Eng

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Most studies on fire properties, including smoke control, have been based on simulations. However, the results of simulation experiments have an average error rate of approximately 36.7%, and data with low reliability are obtained, compared to theoretical values and actual-scale measurements. In addition, experimental studies using scale models exhibit an average error rate of 6.9%, significantly lower than those of simulation experiments. In this study, a method for decreasing the error rate of simulation experiments was investigated by constructing a database using scale-model smoke control experiments.

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“…Prototype Model [3,5,6,8,[12][13][14][15][16][17][18][19][20][21][22][23][24][25] Simulation [24][25][26][27] Form of Architecture…”

Section: Research Trends and Error Rate Analysis Methodsmentioning

confidence: 99%

Case Study Analysis of Database Construction for Smoke Control Simulation Experiments Using Scale Model

Im¹,

Kim²,

Jeong³

et al. 2023

Int J Fire Sci Eng

View full text Add to dashboard Cite

show abstract

“…The validity and accuracy of the scaling law were examined in some studies. For example, Ko [11] conducted large-scale and small-scale compartment fire numerical simulations for existing experimental studies [12,13] to evaluate the effectiveness of the scaling law based on the ventilation parameters applied to compartment fire studies. The results of the analysis confirmed that the flow pattern, ejected flame behavior, and temperature distribution characteristics inside the compartment were similar between the large-scale and small-scale models.…”

Section: Parametermentioning

confidence: 99%

Examination of the Scaling Law of Fire Phenomena in Compartment with Horizontal Natural Opening using Numerical Simulation

2022

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The scaling law was examined using numerical simulation for fire phenomena in a compartment with a horizontal natural opening in this study. The results of the large-scale conversion of the scaled model numerical simulation results ([Small-scale] condition) from the earlier studies obtained by applying the scaling law were compared to those of the large-scale numerical simulation performed in this study ([Large-scale] condition). The overall trends for the effects of horizontal natural opening area and fire source location on the discharge mass flow rate through the horizontal natural opening, temperature distribution in the compartment, and flow velocity through the horizontal opening were found to be identical under the [Small-scale] and [Large-scale] conditions. A complex bidirectional flow was observed through the horizontal natural opening under the conditions of this study and the accuracy in predicting the average W-velocity value based on the scaling law was low; however, the accuracy in predicting the range of velocity fluctuation was higher than the average value under certain conditions. Based on the standard deviation of the numerical simulation results, the percentages of the data within ± 30% of the difference between the [Small-scale] and [Large-scale] conditions relative to the total number of data were 100, 75, and 88% for the discharge mass flow rate, temperature, and flow velocity through the horizontal natural opening, respectively. The accuracy of the scaling law was found to be high for the discharge mass flow rate under the conditions considered in this study.

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A Study on Fire Hazards in Multiple Compartments with Lightweight Partition Walls

Park¹,

Choi²,

Jin³

et al. 2020

Fire Sci. Eng.

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This paper presents the study of a fire risk to the backside of two miniatures of ISO 9705 2/5 using a lightweight partition for indoor space division and reproduction of the ISO 9705 test. An SGP partition, stud partition, glass wool panel, urethane foam panel, sandwich panel, and glass partition were selected as the test specimens, which are frequently used in construction. According to the ISO 9705 test standard, stabilization was achieved using a measuring device that recorded data before the ignition of a burner and continued recording for 120 s thereafter. After ignition was achieved, the power was increased to 300 kW for 600 s and then reduced to 100 kW for 600 s. The specimens were subsequently observed for 180 s, and the fire risk to the backside and the fire pattern of the wall unit were analyzed. Owing to the amount of heat generated by the ignition source, the maximum temperature of the backside was observed to be 67.7 ℃ for the SGP partition, 55.1 ℃ for the stud partition, 52.4 ℃ for the glass wool panel, 727.4 ℃ for the sandwich panel, 561 ℃ for the urethane foam panel, and 630.5 ℃ for the glass partition. In the cases of the sandwich and urethane foam panels, the explosion of flammable gas occurred by virtue of fusion of the interior materials. The reinforced glass was fractured owing to the temperature difference between the heat- and nonheat-responsive parts. Ultimately, the fire risk to the nearby section room was deemed to be high.

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Numerical Study on the Validity of Scaling Law for Compartment Fires

Cited by 4 publications

References 7 publications

Case Study Analysis of Database Construction for Smoke Control Simulation Experiments Using Scale Model

Case Study Analysis of Database Construction for Smoke Control Simulation Experiments Using Scale Model

Examination of the Scaling Law of Fire Phenomena in Compartment with Horizontal Natural Opening using Numerical Simulation

A Study on Fire Hazards in Multiple Compartments with Lightweight Partition Walls

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