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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Fire Science and Engineering
Journal Basic Information
Journal DOI :
Korea Institute of Fire Science and Engineering
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Volume & Issues
Volume 23, Issue 6 - Dec 2009
Volume 23, Issue 5 - Oct 2009
Volume 23, Issue 4 - Aug 2009
Volume 23, Issue 3 - Jun 2009
Volume 23, Issue 2 - Apr 2009
Volume 23, Issue 1 - Feb 2009
Selecting the target year
A Study on Sensitivity Analysis for Numerical Solution of Passenger Train Fire
Kim, Woo-Seok ; Roh, Sam-Kew ; Jung, Woo-Sung ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 1~6
The aim of this study is to analyse the sensitivity of fire simulation parameters including grid size and solid angle number which affect the performance of subway cabin fire simulation by FDS 4.07 version. The results of sensitivity analysis shows average of
differences in plume temperature, upper layer temperature, and layer height depending on the change of grid size. The study also shows that simulation with 0.05m grid size produces better resolution than that with coarse one which is 0.1m.
A Study on Analysis of Arc Current Waveforms for Detection of Prognostics of Electrical Fires
Hwang, Jin-Kwon ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 7~14
Several electrical loads such as inrush current, normal operation arcing and non-sinusoidal loads have normal current waveforms similar to arc waveforms. To detect arcs in such loads, therefore, it is necessary to analyze difference between current waveforms with or without arcs. In this paper, using apparatuses of arc generation in UL 1699, arcs are generated in these loads and, then, arc current waveforms are investigated in both the time and the frequency domains to find arc characteristics. This investigation shows that arc current signals have shoulders at some zero current points in the time domain and increment of spectrum magnitude in all over frequency domain. It also shows that the arc characteristics at normal operation arcing and non-sinusoidal loads are detected more easily in the frequency domain than in the time domain. This investigated arc characteristics are expected to be utilized as the basis of development of arc-fault circuit interrupters.
Spatial Patterns of Forest Fires between 1991 and 2007
Lee, Byung-Doo ; Lee, Myung-Bo ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 15~20
For the effective management of forest fire, understanding of regional forest fire patterns is needed. In this paper, forest fire ignition and spread characteristics were analyzed based on forest fire statistics. Fire occurrences, burned area, rate of spread, and burned area per fire between 1991 and 2007 were parameterized for the cluster analysis, which results were displayed using GIS to detect spatial patterns of forest fire. Administrative districts such as cities and counties were classified into 5 clusters by fire susceptibility. Metropolitan areas had fire characteristics that were infrequent, slow rate of spread, and small burned area. However, 4 cities and counties showing fast rate of spread, and large burned area, in the eastern regions of Taeback Mountain range, were the most susceptible areas to forest fire. The next vulnerable cities and counties were located in the West and South Coast area.
A Study on Thermal Characteristics and Ignitability of Dead Leaves and Living Leaves for Main Species of Trees in Youngdong Areas
Lee, Hae-Pyeong ; Lee, Si-Young ; Park, Young-Ju ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 21~32
In order to inspect the danger of forest fires, the thermal characteristics and the ignitability of the dead leaves and the living leaves for the main species of trees in Youngdong areas have been studied by the TG/DTA and the group flammability tester. From this work, the thermal delay has been increased with the increase of the heating rate. The fractions of the thermal weight loss for the dead leaves and the living leaves of the coniferous trees were higher than those of the broadleaf trees. Also, it was confirmed that the ignitable dangers of the dead leaves and the coniferous trees were higher than those of the living leaves and the broadleaf trees, due to the low auto ignition temperature and thermal resistance.
Analysis on the Reaction-to-fire's Performance of Sandwich Panel Systems by using ISO 5660-1 and EN 13823 Fire Tests
Park, Kye-Won ; Im, Hong-Soon ; Jeong, Jae-Gun ; Kim, Woon-Hyung ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 33~39
In this study, the combustion properties, which are called the reaction-to-fire's performance, of sandwich panels were tested and analyzed according to both ISO 5660 (cone calorimeter method) and EN 13823 (SBI). Several variables including ignition time, mass loss, heat release rate, smoke production rate and
density about four sandwich panels and four core materials (thermal insulation material) were evaluated. Combustion properties' similarity and difference of sandwich panels and core materials were compared by materials and test methods respectively. Finally test results were evaluated by Japanese standard building code, National Building code of Canada and EN 13501-1 as well.
The Research for the Establishment of Test Method of Durability on Intumescent Coating System
Choi, Dong-Ho ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 40~47
Applying fire resistive coating to steel members is one of the general methods to secure fire resistance performance of steel members. And intumescent coating system is currently one of methods giving fire resistance to steel members. Intumescent coating system for fire resistance, however, has undesirable weaknesses that fire resistance performance of steel members is being deteriorated due to cracks and falling-offs of the coverings as time goes after completion of the coverings to the members. So it is necessary to understand changes of the durability and the fire resistance performance of intumescent coating system over a time elapse and to reflect such change properly into the building design and construction. This research is performed to present the test method of durability and the maintenance of intumescent coating system through theoretical investigation of the test method of durability and the guide of maintenance & management of intumescent coating system of several countries, including the Britain, United States, Japan.
A Sensitivity Study of the Number of Parcels to the Numerical Simulation of Sprinkler Sprays
Kim, Sung-Chan ; Lee, Sang-Woo ; Park, Won-Ju ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 48~54
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 particles 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.
A Combustion Characteristics of Attached Jet Flame under the Regular Oscillation
Kim, Dae-Won ; Lee, Kee-Man ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 55~62
A general combustion characteristics of forcing nonpremixed jet in laminar flow rates have been conducted experimentally to investigate the effect of forcing amplitude with the resonant frequency of fuel tube. There are two patterns of the flame lift-off feature according to the velocity increasing; one has the decreasing values of forcing amplitude on the lift-off occurrence when a fuel exit velocity is increasing, while the other has the increasing values. These mean that there are the different mechanisms in the lift-off stability of forced jet diffusion flame. Especially, the characteristics of attached jet flame regime are concentrically observed with flame lengths, shapes, flow response and velocity profiles at the nozzle exit as the central figure. The notable observations are that the flame enlogation, in-homing flame and the occurrence of a vortical motion turnabout have happened according to the increase of forcing amplitude. It is understood by the velocity measurements and visualization methods that these phenomena have been relevance to an entrainment of surrounding oxygen into the fuel nozzle as the negative part of the fluctuating velocity has begun at the inner part of the fuel nozzle.
A Study on the Efficiency of Evacuation Exterior Stairs in High-rise Buildings
Choi, Kyu-Chool ;
Fire Science and Engineering, volume 23, issue 1, 2009, Pages 63~69
Article 36 of the Building Code Enforcement Ordinance requires that an exterior evacuation stairs be installed for the buildings of three stories and over with cultural facilities or gathering places which have over
floor area of public performance halls or recreational facilities. The concentration of population together with the increase of high-rise buildings in cities call for various precautionary measures to be taken against human disasters. For the past ten years high-rise buildings showed 85% of increase, marking a steep rise. This increase of high-rise buildings may lead to human disasters in urban areas and, in case of fire breakout, may cause great loss of human lives and property damages. The most difficult fire-fighting activities in high-rise building fires are those of evacuation. Because smoke spreads through the upper floors, the securement of evacuation route in high-rise buildings may be the only way to minimize loss of lives. In high-rise buildings exterior escape stairs are necessary because it is difficult to secure evacuation route with only direct stairs or interior stairs. The Building Code now in force provides insignificant coverage on the exterior evacuation route installment and therefore becomes an inadequate means for evacuation route securement in high-rise building fires. To compensate for this inadequacy the Building Code should be revised to include a mandatory clause that an exterior evacuation stairs be established for the buildings of ten stories and over which can be categorized into high-rise building group.