• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 한국화재소방학회 2013년도 추계학술대회 초록집
• /
• pp.37-38
• /
• 2013

본 연구는 화재 현상의 해석에서 매우 중요하지만, 학술적으로 정립이 미비된 화염확산(flame spread)에 대한 연구 중 가연물 표면의 경사상태(Inclined Mode)에 대한 것들을 중심으로 고찰을 수행해보았다. 현재 출판된 서적들의 이론과 논문을 중심으로 살펴보았다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 한국화재소방학회 2013년도 추계학술대회 초록집
• /
• pp.77-78
• /
• 2013

BRANZFIRE 모델은 가연성 내장재의 화재위험성을 평가하는 존모델이다. 내장재의 화염확산에 따른 화재성장모델을 공간화재에 적용하는 다실형 존모델로서 특히 ISO 9705 시험화재 시나리오 적용에 매우 유용하다. 본 연구에서는 화재성장모델에서의 화원 및 공간특성 따른 열방출비율과 화염확산 예측 인자의 영향성을 분석하였다

• Fire Science and Engineering
• /
• 제30권6호
• /
• pp.37-42
• /
• 2016

The present study has been performed to examine the feasibility of a flame spread model on the design fire scenario for fire risk analysis. Thermo-Gravimetric analysis and sample burning test were conducted to obtain the material properties of a single couch covered with synthetic leather material and a series of FDS calculations applying with the measured material properties were performed for different grid sizes. The overall fire growth characteristics predicted by the fire model were quite different from the results of a real scale fire test and the initial peak value of the HRR and total released energy showed the results within a 30% discrepancy for the computational grids used in the present study. The current model has some limitations in predicting the fire growth characteristics, such as fire growth rate and the time to the maximum HRR. This study shows that the fire model may be applicable to creating the design fire scenario through continuous model improvement and detailed material properties.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
• /
• 제12권6호
• /
• pp.616-622
• /
• 2000

This paper concerns the application of smoke and fire spread to road tunnel fire problems. When a road tunnel is on fire. a fire protection system of road tunnel have to offer an adequate escape space to human. Therefore, this study carried out a simulation for predicting a spreading path of smoke and fire. The evolution of the flow field is simulated with the low Reynolds number k-$\varepsilon$ turbulent model and SIMPLE algorithm based on the finite volume method.

• Fire Science and Engineering
• /
• 제28권2호
• /
• pp.26-33
• /
• 2014

Recently in Korea, the interest for using window and window-wall in building picks up due to the beauty and utilization of space. But, interior space of the buildings shall be compartmentalized by fire resistance structures in accordance with the Korean building codes to prevent the spread of flame and damage of human life in fire. In case of installing non-insulated glazed window in compartment wall, the flame spread to adjacent space and the damage of human life by radiant heat can occur in fire. On this study, to confirm the risk of radiant heat for non-insulated glazed window in fire, the fire resistance tests were conducted. The temperature rise and heat flux on unexposed space was measured and analyzed.

• Proceedings of KOSOMES biannual meeting
• /
• 해양환경안전학회 2018년도 공동국제학술발표회
• /
• pp.145-145
• /
• 2018

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 한국화재소방학회 2006년도 춘계학술논문발표회 논문집
• /
• pp.187-192
• /
• 2006

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 한국화재소방학회 1997년도 International Symposium on Fire Science and Technology
• /
• pp.146-153
• /
• 1997

An experimental study was performed of natural-convection downward smolder spread across a sawdust bed peripherally enclosed with an insulating container, to examine the effect of the open- ing condition at the top end on downward smolder spread. Experiments were conducted by using relatively coarse sawdust and 25-cm-long cylindrical container The variations of temperature profiles along the bed axis with time were determined far different opening conditions and were com-pared with those in smolder spread from open top to open bottom. It was shown that the smolder zone initiated from open top toward closed bottom penetrates the bed with keeping high peak temperature like the case of open top to open bottom spread, although mean spread rate is smaller. This indicates that the downward smolder zone can be sustained stably if sufficient air or oxygen Is supplied from the back of it by natural convection even if upward draft entering from the bottom of the bed is absent. When the top end was partially closed by mounting a cover after stable smolder spread had begun from open top toward open bottom, the temperature at the peak decreased more than 200 K and the smolder zone became to spread with thickening residue. In this case, the shape of temperature profiles continuously changed or decayed until end-effect at the open bottom end enhanced the reaction. The temperature at the shrunk peak, free from the end-effect, was almost identical with the temperature at the exothermic oxidative-degradation zone in smolder spread from open top to open bottom. from these results, it can be inferred for natural-convection downward smolder spread that the oxidation reaction of the char is very sensitive to the oxygen supply by natural convection in the space above the smolder zone, and that the top end opening condition strongly alters the completeness of reactions, structure, and behavior of the smolder zone.

• Fire Science and Engineering
• /
• 제23권4호
• /
• pp.120-129
• /
• 2009

Identification of the exact cause of a building fire is generally difficult, because the source and initially ignited objects are often severely damaged or even lost during the early stages of the fire. We made an experimental attempt to reasonably estimate the burning during the very early stages of a fire, and identify its source and causes. The case we studied was an apartment fire, which occurred in Tokyo, in July 2002. The fire was extinguished just after flashover, and the on-site investigations suggested the fire started from the TV and TV stand, which had been damaged so severely that it was difficult to conclude that the TV was the ultimate cause of the fire, simply from the on-site investigation. We conducted a series of burn tests using a TV and other products identical to those actually used in the apartment. Tests were set-up and procedures were carefully studied to recreate the conditions of the articles that remained, and of the room itself. The tests demonstrated that the conditions in the apartment could be recreated only when the fire started inside the TV and came into close contact with dresser.

• Fire Science and Engineering
• /
• 제32권6호
• /
• pp.91-99
• /
• 2018

Recently, the spread of ESS in Korea has increased and a fire accident has also occurred. By July 2018, there were a total of 7 cases. All 7 cases were ESS systems consisting of lithium-ion batteries and were burned down. Both the automatic fire extinguisher and the fire department were not able to digest. In this paper, the characteristics of ESS fire are analyzed based on recent ESS fire situation and field investigation, and the cause of fire is divided into environmental, electrical and thermal factors. As a result, it was found that the ESS fire was correlated with the installation environment of the system. In the domestic and overseas lithium ion battery test standard and ESS facility standard survey, the trends and differences of domestic and overseas facilities standards were identified. Based on the fire status and field investigationy, and domestic and overseas facility standard survey, measures were suggested to prevent and prevent the spread of fire in ESS fire.