• Title, Summary, Keyword: full scale fire test

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Experimental Study of Radiation Heat Flux for the Pool and Spill Fire in Petroleum Storage Tanks (석유류 저장 탱크에서의 액면 및 유츌화재에 대한 복사열의 실험적 연구)

  • Kim, Hong;Park, Hyung-Ju
    • Journal of the Korean Society of Safety
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    • v.19 no.1
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    • pp.88-93
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    • 2004
  • This experimental study was carried out to evaluate effect of the radiation heat flux for the pool and spill fire in petroleum storage tanks, which were made form steel. Each of them had the capacity of 250, 2500 and 25000 liter, respectively. The effects of the radiation heat flux are as follows; 1) The intensity of radiation heat flux from a flame decreased exponentially with increasing distance from outside wall of tanks, and increased significantly with surface area of tank and dyke. 2) In the case of 25000L tank, the radiation heat flux was about max. 98.9kW/$m^2$ in 1m from wall of tank. 3) The distance, that was able to ignite wood or plastics by radiation heat flux of approximately 12.5kW/$m^2$, was about 3.14m from wall of 25000L tank.

A Research on Thermal Properties & Fire Resistance of A Water Film Covered Glazing System for Large Atrium Space (대규모 아트리움에 적용되는 수박형성 유리벽의 열적 특성 및 내화성능에 관한 연구)

  • 박형주;지남용
    • Fire Science and Engineering
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    • v.13 no.4
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    • pp.38-55
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    • 1999
  • In order practically to use fire-defective glazing materials for the compartment wall where a fire-protection rating is mandated, there have been many trials internationally, This research focuses on a feasibility that, if certain water film covered all surface of glass, the glazing system can endure without breaking out under the compartment fire. First of all, a water film spray system was specially designed to wet the entire surface of the glass and also to have tiny small amount of water rebounded from the surface after emitted from nozzles. After this system has proven to have perfect performance, small-scale tests were done to find out if the water film covered glazing system react to the high temperature curve in a small furnace room. Finally, on basis of the obtained data, full-scale experiments were done so that water-film covered glazing system can pass the Korean Standard (KS) test for fire resistance, KS F2257.

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Fire Test of Old Type Interiors of Subway Vehicle in ISO 9705 Room (ISO 9708 룸 설비를 이용한 구형 지하철 내장재 화재시험)

  • Lee, Duck-Hee;Park, Won-Hee;Jung, Woo-Sung;Hwang, Jung-Ho
    • Journal of the Korean Society for Railway
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    • v.13 no.5
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    • pp.481-487
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    • 2010
  • A room scale fire test was done for interior materials from a subway vehicle installed within an ISO 9705 fire test room. The interior materials are the old ones which were made before the new fire safety guideline of subway vehicles. The output of ignition burner was increased in controlled steps to CEN/TS 45545-1. The objectives of this interior fire test are to assess the fire performance in terms of ignition and flame spread on interior lining materials and to provide data on an enclosure fires involving subway vehicle interior materials that grow to flashover. Temperatures, heat flux and heat release rate variations verse time of the test are measured. Heat release rate is compared with that of calculated by modified flaming area based summation method. These test results will be used for verification of CFD fire simulation of full subway vehicle.

Experimental Studies on PSC Airpit-Slab with Fire Resistance Panel under Static and Dynamic Loads (내화패널이 부착된 프리캐스트 PSC 풍도슬래브의 정적/동적하중에 관한 실험연구)

  • Kim, Tae Kyun;Bae, Jeong;Choi, Heon;Min, In Gi
    • Journal of The Korean Society of Civil Engineers
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    • v.32 no.4A
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    • pp.245-253
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    • 2012
  • In the longway tunnel and underground traffic road, the structure of transverse ventilation system is constructed by the airpit slab. In this study, the full scale specimens of the PSC airpit slab that attached fire resistance panel are performed the static and dynamic loading tests for evaluation of bending capacity. The first of all, it confirmed the evaluations about the fundamental efficiency of the fire resistance panel and PSC slab by the 3-point bending test and pull-off test. The tests are performed for evaluation of the bending resistance under ultimate static load and the bonded capacity under dynamic fatigue load. A fatigue test is performed for an investigation of the effect on wind pressure that is developed by transit of traffic. The damage or debonding on surface between fire resistance panel and PSC slab was not developed in dynamic fatigue load test, also the behavior of the specimens is very stable and the debonding of the fire resistance panel attached at the bottom surface of PSC slab was not developed in static load test, too. Therefore, the crack or debonding of the fire resistance panel will be not developed by external loads during the construction or completion of the precast fire resistance system.

Study on the Determination of Fire Protection Thickness based on Section Factor (강재의 단면형상에 따른 내화피복두께 산정 연구)

  • 정청운;지남용;권인규
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.139-142
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    • 2003
  • Traditionally, the thickness of fire protection materials of structural elements such as beam and column have been decided by fire test using the predominant steel section of $H-300{\times}300{\times}10{\times}15$ for column and $H-400{\times}200{\times}8{\times}13$ for beam in Korea. But this way of determination of fire protection thickness yields very unduly results. Because the temperature-increment rate of structural steel elements depends mainly on magnitude of their cross-areas. In general, the thicker size of cross-areas for structural elements, the lower temperature shows up. It had already proved that the fire protection thickness only depends on the size of cross-areas and the fire protection method for three-fide or four-side exposed conditions in European countries, the United State of America and so on. To demonstrate there would be differences among various cross-areas for structural elements, we conducted several fire tests with full-scale specimens of beams and columns. For the determination of critical temperature for steel section when the fire resistant performance is needed to be decided, we conducted with a loaded fire test for beam and column, respectively. The small column in 1.0 meter length and beam in 1.5 meter length were used in order to deprive the rational fire protection thickness of structural elements such as beam and column, respectively. After test, we could obtain there were significant temperature lass between higher cross-areas and lower cross-areas. The critical temperature of steel as a criterion is used 538$^{\circ}C$ for column and 593$^{\circ}C$ for beam which is from ASTM E 119 because we don't make provisions as critical temperature by elements. We could consider that the best way of determination of fire protection thickness is using the following multi-regression equation which was deprived from several fire tests using the concept of section factor, FR(column) = 0.17 +5191.49t A/Hp + 40.77t, FR(beam) = 0.25 +6899.31t A/Hp + 32.60t(where, FR means fire resistant time, t means thickness, A means cross-area and Hp means heated parameter).

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Developments in Fire Sprinkler Technology

  • Rice, Douglas
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • pp.606-609
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    • 1997
  • Technology in fire sprinklers has exploded. There is more private fire sprinkler research now than ever before. New technology in fire sprinklers has tested the existing standard and found that it was wrong in some cases, it has provided new sprinklers that control fire better while reducing the cost of the overall system. This expansion of the types and applications of fire sprinklers has created a great need for education for the Authorities Having Jurisdiction and the Engineer as they must be able to make informed decisions regarding this new technology. Significant research has been done at Factory Mutual Research Corporation and Underwriters Laboratory in the United States. Full scale fire testing is done to prove any new technology did not lower the level of protection of existing fire sprinkler system installations. In each and every case, the existing level of fire protection was the baseline against which the new sprinklers were tested. This level can not be lowered for the test to be considered a success. This is intended to be an overview of the developments in fire sprinklers. Although extensive detail is not included, the overall aspects of these developments can be discussed. The research that will be covered will include the following general subjects: high piled and rack storage sprinkler protection without in-rack sprinklers, extended coverage and quick response sprinklers for ordinary and light hazard occupancies, as well as special sprinklers and their applications.

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A Study on the Flame Growth Characteristics of Household Items(Refrigerator·Washing machine·Drawer·Sofa) (생활용품(냉장고·세탁기·장롱·소파)의 화재성장 특성 연구)

  • Park, Young Ju
    • Journal of the Korean Society of Safety
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    • v.30 no.3
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    • pp.45-51
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    • 2015
  • This study was full-scale combustion test for flame growth characteristics and temperature characteristics analysis to predict the risk of household Items fire when fire occurs. Experimental results, Refrigerator flames were the highest measured in 15 min time, and Washing machine is between 20 ~ 30 min, Drawer is 5 min, Sofa was enabled up to the size of the flame 15 min. In addition, the maximum combustion temperature was found from the time 20 min ~ 25 min, Sofa is temperature was elevated up to $1190^{\circ}C$, Refrigerator is $1,162^{\circ}C$, Drawer is $822^{\circ}C$, Washing machine appeared to be rising up to $670^{\circ}C$. Therefore, in the case of the maximum temperature of combustion Sofa it showed relatively high.

Investigation of Material Characteristics of Reinforced Concrete Beam After Exposure to Fire Test (화재 실험에 따른 철근 콘크리트 보의 재료특성 연구)

  • Ju, Min-Kwan;Park, Cheol-Woo;Oh, Ji-Hyun;Seo, Sang-Gil;Shim, Jae-Won
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.20 no.3
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    • pp.33-41
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    • 2016
  • Concrete is inherently a good fire-resistance material among all other constrcution materials and protects the reinforcing steel inside. This study investigates the material characteristics of concrete and steel bar inside the full scale reinforced concrete(RC) beam exposed to fire test. The fire test specimen was 4 m long and the test was conducted under no loading condition following KS F 2257. Fire source is simulated by ISO 834 and number of thermocouples were installed to measure temperature variation of surfaces and inside of the beam. The measured compressive strength of cored specimen, which was exposed to fire test, was 11 MPa, about 66% lower than the strength before exposure. The yielding strength of steel bar also decreased about 75 MPa, about 17% lower. The measured temperature of protected steel bar was around $649^{\circ}C$, the critical limit, after 4 hour exposure.

On the Method for Hot-Fire Modeling of High-Frequency Combustion Instability in Liquid Rocket Engines

  • Sohn, Chae-Hoon;Seol, Woo-Seok;Valery P. Pikalov
    • Journal of Mechanical Science and Technology
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    • v.18 no.6
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    • pp.1010-1018
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    • 2004
  • This study presents the methodological aspects of combustion instability modeling and provides the numerical results of the model (sub-scale) combustion chamber, regarding geometrical dimensions and operating conditions, which are for determining the combustion stability boundaries using the model chamber. An approach to determine the stability limits and acoustic characteristics of injectors is described intensively. Procedures for extrapolation of the model operating parameters to the actual conditions are presented, which allow the hot-fire test data to be presented by parameters of the combustion chamber pressure and mixture (oxidizer/fuel) ratio, which are customary for designers. Tests with the model chamber, based on the suggested scaling method, are far more cost-effective than with the actual (full-scale) chamber and useful for injector screening at the initial stage of the combustor development in a viewpoint of combustion instabilities.

Full-scale Fire Suppression Test for Application of Water Mist System in Road Tunnel (미분무수 소화시스템의 도로터널 적용을 위한 실물 화재 실험)

  • Han, Yong-Shik;Choi, Byung-Il;Kim, Myung-Bae;Lee, Yu-Whan;So, Soo-Hyun
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • pp.171-174
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    • 2010
  • 도로터널에서의 미분무수 소화시스템의 적용 가능성을 검토하기 위해 실물 화재 실험을 수행하였다. 적용된 화원은 실물 승용차 화재와 유류화재를 모사한 화원면적 $1.4m^2$의 heptane pool 화재이며, 기존 도로터널에 설치된 저압 물분무 시스템과 고압 미분부수 소화시스템과의 냉각효과 비교실험을 수행하였다. 도로터널 내의 환기조건을 구현하기 위해 실물모형 터널의 한 편에 터널 유속(0.9~3.8 m/sec 범위) 발생장치를 설치하였으며, 화원에서 하류 방향으로 터널 내 온도분포를 측정하였다. 실험 결과 1/5의 유량을 사용하는 고압 미분무수 소화시스템은 저압 물분무 시스템과 동등한 수준의 냉각효과를 보였다.

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