• 한국안전학회지
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• 제20권2호
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• pp.11-17
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• 2005

Rotational motion in the atmosphere around a fire may have a profound influence on the fire plume. This process underlies the occurrence of fire whirls. Fire whirls are rare but highly destructive phenomenon which were observed in a large forest, urban and building fires. The present study aims to investigate of the effect of rotation Strength on the fire whirl characteristics expeimentally. Experiments are performed for various sizes of fire source with different rotation strength. From the experimental observations, it is noted that the mean centerline temperature is gradually increased and mean radial temperature is decreased as increases rotation strength. The characteristic mean flame height of fire based on the visible observation is increased as increases of dimensionless swirl parameter, $\Omega/\alpha$, represented by swirl induced motion to buoyancy driven motion.

• 한국화재소방학회논문지
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• 제22권5호
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• pp.55-60
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• 2008

본 연구는 수분무 소화설비의 효용성에 대한 기초평가를 수행할 목적으로 FDS 수치시뮬레이션을 수행하였다. 화재강도(20MW, 50MW) 및 풍속의 변화에 따른 화재시 온도 및 연기농도에 대한 안전성 확보 효과를 분석하였다. 터널내 풍속이 없는 경우 수분무는 냉각효과에 의한 온도 및 연기농도 감소효과가 아주 우수하여 대피자의 안전성 확보에 효과적이었다. 화재강도가 커질수록 연기이동 억제효과는 감소한 결과를 나타났다. 또한 터널내 기류가 존재하는 경우에는 냉각효과에 의해서 연기의 성층화를 교란하며, 대피시 가시도를 저하시키는 것으로 나타났다. 따라서 수분무 소화설비는 화재발생시 대피자가 대피한 후에 이루어져야 할 것으로 판단된다.

• 문화기술의 융합
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• 제6권1호
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• pp.43-53
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• 2020

이 연구에서 우리는 아파트 세대 내에 화재발생 시 대피요령에 따른 화재의 불안요인을 낮추며 관리사무소의 관리역량이 안전의식 및 화재대응에 미치는 영향력에 대한 조절효과를 분석하였다. 연구결과는 첫째, 아파트 거주자의 안전의식 및 관리주체의 인식이 화재대응성과에 정(+)의 영향을 미치는 것으로 나타났다. 이는 아파트 거주자의 안전의식 및 관리주체의 인식수준이 높을수록 화재대응성과도 높아짐을 알 수 있다. 둘째, 관리사무소의 관리역량 수준이 높을수록 안전의식 및 관리주체의 인식이 화재대응성과에 정(+)의 영향을 미치는 것으로 나타났다. 이러한 결과는 관리사무소장의 리더십이 높을수록 아파트 거주자의 주거만족도도 높은 경향을 보이고 거주자와의 소통하는 자세가 높을수록 화재대응성과에도 긍정적인 영향이 있음을 의미한다. 마지막으로, 관리사무소 관리역량은 아파트거주자의 안전의식 및 관리주체의 인식수준이 화재대응성과에 미치는 영향을 조절하는 효과가 있는 것으로 분석되었다. 이러한 결과는 모형의 R² 값의 변화량이 1단계보다 2단계가 증가하였고 3단계에서는 조절변수의 상호작용 항을 추가함에 따라 단계적으로 증가하였다. 따라서 조절변수인 관리사무소 관리역량은 아파트거주자의 안전의식 및 관리주체의 인식수준이 화재대응성과에 미치는 영향을 조절하는 효과가 있는 것으로 분석되었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.184-185
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• 2013

Concrete filled steel Tube(CFT) columns have great strength but also fire resistance performance due to the heat storage effect of concrete. In this research, we focus on the fire performance of CFT using 100 MPa concrete without fire protection. We use steel fiber and nylon fiber for fire resistance. We perform the fire test of CFT specimen with loading 200, 300 and 400 ton. To investigate the effect of loading to fire resistance, we compare the fire resistance time according to the loading.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 1997년도 International Symposium on Fire Science and Technology
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• pp.305-310
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• 1997

There are many parameters in prediction of forest fire spread. The variables such as fuel moisture, fuel loading, wind velocity, wind direction, relative humidity, slope, and solar aspect have important effects on fire. Particularly, wind and slope factors are considered to be the most important parameters in propagation of forest fire. Generally, slope effect cause different wind distribution in mountain area. However, this effect is disregarded in complex geometry. In this paper, wind is estimated by applying computational fluid dynamics to the forest geometry. Wind velocity data is obtained by using CFD code with Newtonian model and slope is calculated with geometrical data. These data are applied fer 2-dimentional forest fire spreading algorithm with Korean ROS(Rate Of Spread). Finally, the comparison between the simulation and the real forest fire is made. The algorithm spread of forest fire will help fire fighter to get the basic data far fire suppression and the prediction to behavior of forest fire.

• 전기학회논문지
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• 제64권2호
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• pp.349-352
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• 2015

This paper estimates electrical fire damage cost-effect to analyze electrical safety efficiency by applying a cost-benefit analysis method for analyzing the efficiency of a business public interest. Electrical fire loss statistics data was presented as direct costs and casualties, including deaths due to an electrical fire, this paper adds overhead "Incidental Cost of Accidents to the Employer" by W. H. Heinrich was applied to estimate the cost of economic loss. Also wounded, including the loss of human deaths by referring to the car accident insurance claims costs and human development estimated the losses caused by an electrical fire. And to perform a cost-benefit analysis of the electrical safety as a result of future work. In this paper, the economic effect of the electric field of safety and public interest work to systematically presented.

• 전기학회논문지P
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• 제64권2호
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• pp.45-49
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• 2015

This paper presents a quantitative analysis method to quantitatively indicate a electrical fire preventive effect of safety inspection for electrical facilities for general use. Logic model was developed based on whether enforcement of safety inspection for electrical facilities, and then the developed analysis model was converted to hydraulic model by using mathematical logic. The electrical fire preventive effect of safety inspection for electrical facilities was quantitatively calculated by applying electrical safety inspection results and fire statistics for five years to the developed hydraulic model. The results show that electrical fire preventive effects of 5,542 cases on annual average for five years.

• 한국화재소방학회논문지
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• 제14권3호
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• pp.6-12
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• 2000

본 연구는 두 가지 유형의 3차원 실내 공간 내에서 화재 발생시 연기거동에 미치는 복사영향을 알아보기 위해 자체개발한 SMEP(Smoke Movement Estimating Program) Seld 모델을 사용하여 수치해석하였다. PISO 알고리즘과 부력항을 포함한 수정 k - e 난류모델을 사용한 SMEP은 연속, 운동, 에너지, 농도 그리고 복사 열 전달 방정식을 풀었으며, 복사 열 전달 방정식의 해석을 위하여 S-N 구분종좌표법을 채택하여 사용하였다. 수치해석 결과 연기의 온도분포는 복사를 고려하지 않고 대류만을 고려했을 경우 실험치와 많은 오차를 보였으나 복사를 함께 고려했을 경우는 실험치와 작은 오차범위로 비슷한 경향을 나타내었다. 이것은 연기속에 포함되어 있는 연소생성물 중 H2O와 CO2 가스의 복사 영향 때문이며, 따라서 좀더 실제적인 화재해석에 있어서 복사는 반드시 고려되어야만 한다.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2008년도 추계학술논문발표회 논문집
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• pp.363-370
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• 2008

The present study has been performed to investigate the effect of statistical number of droplets on the simulation of the sprinkler spray using fire field model. In order to simulate the sprinkler spray characteristics, the present study uses NIST Fire Dynamics Simulator version 5.2. A group of Lagrangian particle with similar droplet characteristics, such as diameter, velocity, temperature and so on, is represented by parcel concept to decrease the total number of droplets tracked in the simulation. The present study introduces a new parameter to represent the ratio between real number of droplets and computational parcels. The dependency of the number of parcels on the fire suppression characteristics and spray patterns is quantitatively examined for different ratio between the real number of droplets and computational parcels.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.153-156
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• 2008

Comparative analysis of forest fire danger rating on the forest characteristics of thinning area and non-thinning area on forest fire burnt area was studied in this work. To investigate the effect of thinning slash in forest fire, Gangneung-si Wangsan-myeon, Ulgin-gun Wonnam-Myeon, Samchok-si Gagok-Myeon, in which forest fire broke out, were selected. As a result that investigated forest fire danger ratio between thinning slash and non-thinning slash, leeward scorching ratio(36%), crown damage ratio(29%), mortality of branch at the former are higher than those at the latter, leeward scorching ratio of tree, where thinning slash is around, is 10%-20% higher than that of independent tree. So I estimate that thinning slash has a some effect on the intensity of forest fire. And the result to investigate damage of forest fire according to tree species shows that leeward scorching ratio of conifer is 5% higher than that of non-conifer, and mortality of branch of the former is 19% higher than that of the latter. It is considered that forest fire may affect directly to a tree trunk if it diffuse to piled thinning tree because there was no space between thinning trees and trees. Furthermore, it was found that re-ignition had a chance to occur due to lots of piled thinning trees.