http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김동운(K.W. Kim),박원희(W.H. Park),김치훈(C.H. Kim),정우성(W.S. Jung),이덕희(D.H. Lee) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
In this study, fire behavior for subway coach fire in the 1/10 reduced scale model is analyzed using numerical analysis method (FDS). The size of the reduced model coach is 1.9 m long, 0.290 m high and 0.235 m. The simulation is carried out only one-sided four doors of the coach are opened. A fire source is the n-heptane pool fire with a mean heat release rate 2.33 kW. Smoke temperature, heat release rate and mass loss rate for the model are calculated.
Dual - bed type 의 압축천연가스 자동차 배기가스 정화용 촉매개발
정우성,김영철,박남국,선우창신 ( W . S . Jung,Y . C . Kim,N . C,Park,C . S . Sunwoo ) 한국공업화학회 1997 응용화학 Vol.1 No.1
Experiments have been conducted to investigate performance of compressed natural gas vehicle by single-bed and dual-bed type catalytic converter. All the catalysts was modifed to add to properly La, Zr and Ce concentration. The activity of methane oxidation varied as follows, Pd>Pt/Rh>Pt. Dual-bed type catalyst was better than single-bed type Pd catalysts in methane conversion. When NO was coexisted in mixture gas for investigating performance of catalysts, the conversion of methane oxidation was increased as many as NO concentration in mixture gas and the poison of NO was not effected to dual-bed type catalyst.
LES(FDS code)기법 및 RANS의 난류모델을 사용한 터널화재 유동 전산모사의 비교 고찰
김학범(H.B. Kim),장용준(Y.J. Jang),정우성(W.S. Jung),박원희(W.H. Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
In this study, comparative analyzing on the tunnel-fire driven flow is performed using numerical simulation with LES and RANS method. FDS code is employed to calculate turbulent flow for LES and SMARTFIRE code for RANS. C. C. Hwang[1,2]'s experimental results of scaling tunnel fire are employed to compare with the numerical simulation. The Geometric dimension of tunnel is 5.4m(L) × 0.4m(W) × 0.3m(H). HRR of fire is 3.3kW and ventilation-velocity is 0.33m/s in the scaling tunnel. Applied models to simulation with FDS code are Smagorinsky model for viscosity, Mixture Fraction for combustion and FVM for radiation. Modified k- model is applied for turbulence, the Mixture ε Fraction for combustion and Six-Flux for radiation in SMARTFIRE code. Methane is used as the main fuel of natural gas in the both code. Non-Scattering gas are assumed for radiation transport. The variously dense grid-distributions are studied in the simulation results.
대심도 지하역사에서의 화재시 플랫폼 스크린 도어에 의한 열, 연기 거동 영향 분석
장용준(Y. J. Jang),김학범(H. B. Kim),이창현(C. H. Lee),정우성(W. S. Jung) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
In this study, fire simulations were performed to analyze the characteristics of the fire driven flow and the effects of the platform screen door on the smoke flow in the station, when the fire occurred in the center of the platform. Soongsil Univ. station (line number 7, 47m in depth underground) was chosen which was the one of the deepest underground subway stations in the Seoul metro, SMRT. The parallel computational method was employed to compute the heat and mass transfer eqn's with 6 CPUs of the linux clustering machine. The fire driven flow was simulated with using FDS code in which LES method was applied. The Heat release rate was 10㎿ and The Ultrafast model was applied for the growing model of the fire source. The 10,000,000 structured grids were used
종단부 유속조건 변화에 따른 철도터널 내 정상상태 화재유동해석
이동찬(D.C. Lee),이덕희(D.H. Lee),정우성(W.S. Jung),박서현(S.H. Park) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
In this study CFD(Computational Fluid Dynamics) analysis of the steady fire-driven fluid flow for the performance test of ventilation at railway tunnel between Heuksok and Nodeul Station from Seoul Metro 9 is performed. There were fans with exhaust and intake modes and each was installed at the middle and both ends of the tunnel. For this test, the pool fire source of methyl alcohol with 1.5MW and smoke generators were installed between the middle of tunnel and Heuksok Station. In this test, the smoke behavior from natural convection was observed for 10 minutes from the ignition of pool fire and then fans with intake-modes at both sides of Heuksok Station and exhaust-modes at the middle of tunnel and nearby Nodeul station were operated. In the analysis, the effect of fan-on with intake mode located in the opposite side of the tunnel nearby Heuksok Station on fire-driven fluid flow is studied on when the boundary conditions of fan-on at the tunnel between Heuksok and Nodeul Station are the same as test. FLUENT, a commercial CFD code, is used for this analysis.
김학범(H. B. Kim),김치훈(C. H. KIM),이덕희(D. H. Lee),장용준(Y. J. Jang),정우성(W. S. Jung),김진곤(J. K. Kim) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
철도 승강장의 매점은 현재 신문판매대, 표준 간이매점, 간이매점(복권방)등의 형태로 운영되고 있다. 따라서 신문이나 잡지등은 쉽게 불에 붙기 때문에 화재의 발화원이 되며, 대구 지하철 화재사고와 마찬가지로 방화의 대상이 될 수 있다. 이에 본 연구에서는 실규모의 매점 화재 실험을 통하여 열방출율과 독성을 측정 분석하고 이에 대한 승강장 매점의 화재방재 요건을 마련코자 한다. Recently, a lot of newsstands and mini station-store are operated as a store at the platform of subway. But the papers and magazines which are main articles for sale could be as the source of fire ignitable because those kind of easy flammable. Therefore the newsstands could be the target for fire. In this paper, fire experiments were conducted to find out characteristics and to plan the fire-safety for Newsstands and Mini station-stores fire