http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
종류식 배연 터널 화재시 배연속도가 연소율에 미치는 영향에 대한 실험적 연구
양승신,유홍선,최영기,김동현 대한설비공학회 2005 설비공학 논문집 Vol.17 No.10
In this study, the 1/20 reduced-scale experiment using Froude scaling were conducted to investigate the effect of longitudinal ventilation velocity on the burning rate in tunnel fires. The methanol pool fires with heat release rate ranging from 2.02kW to 6.15kW and the n-heptane pool fires with heat release rate ranging from 2.23kW to 15.6kW were used. The burning rate of fuel was obtained by measuring the fuel mass at the load cell. The temperature distributions were observed by K-type thermocouples in order to investigate smoke movement. The ventilation velocity in the tested tunnel was controlled by inverter of the wind tunnel. In methanol pool fire, the increase in ventilation velocity reduces the burning rate. On the contrary in n-heptane pool fire, the increase in ventilation velocity induces large burning rate. The reason for above conflicting phenomena lies on the difference of burning rate. In methanol pool fire, the cooling effect outweighs the supply effect of oxygen to fire plume, and in n-heptane pool vice versa.
터널화재시 배연속도가 연소율변화에 미치는 실험적-Heptane 풀화재 경우
양승신,유홍선 사단법인 한국터널지하공간학회 2005 한국터널지하공간학회논문집 Vol.7 No.2
In this study, the 1/20 reduced-scale experiments using Froude scaling were conducted to investigate the ventilation velocity of the variation of burning rate in tunnel fires. The heptane square pool fire with heat release rate ranging from 3.71~15.6 kW were used. The burning rate of fuel was obtained by measuring mass using load cell and temperature distributions were measured by K-type theomocouples in order to investigate smoke movement. The ventilation velocity in the tested tunnel was controlled by inverter of the wind tunnel. In heptane pool fire case, the increase in ventilation velocity incresed the burning rate due to the direct supply of oxygen to the fire plume. For the same dimensionless velocity(), burning rate increased as the size of pool fire decreased. 본 연구는 터널내 화재시 배연속도가 연소율 변화에 미치는 영향을 파악하기 위하여 Froude scaling에 의해 1/20 크기로 축소한 모형화재 실험을 수행하였다. 화원으로는 4.5 cm~8.5 cm의 헵탄을 사용하였으며 발열량은 3.71~15.6 kW이다. 연소율은 로드셀을 이용하여 산출하였고, 연기거동을 파악하기 위하여 K형 열전대를 이용하여 온도분포를 측정하였다. 풍동은 터널 상류 한쪽부분과 연결하였고, 터널 공간의 배연속도를 제어하기 위하여 풍동의 인버터를 조정하였다. 헵탄 풀화재인 경우 배연속도가 증가할수록 충분한 산소의 공급으로 연소율은 증가하였으며, 같은 무차원 속도()일때 화원 크기가 작아짐에 따라 연소율은 증가하였다.
터널 화재시 종류식 환기가 연소율 변화에 미치는 영향에 관한 실험적 연구
양승신(Seung Shin Yang),김성찬(Sung Chan Kim),유홍선(Hong Sun Ryou) 한국암반공학회 2005 터널과지하공간 Vol.15 No.1
본 연구는 터널대 화재 발생시 종류식 환기가 연소율 변화에 미치는 영향을 파악하기 위하여 Froude scaling에 의해 1/20크기로 축소한 모형화재 실험을 수행하였다. 화원으로는 8.5 ㎝-14.5 ㎝의 메탄올을 사용하였으며 발열량은 3.57 - 10.95㎾이다. 연소율은 로드셀을 이용하여 산출하였고, 연기거통을 파악하기 위하여 K형 열전대를 이용하여 온도분포를 측정하였다. 풍동은 터널의 한쪽부분과 연결하였고, 터널 공간의 배연속도를 제어하기 위하여 풍동의 전압을 조절하였다. 메탄올 화재인 경우 배연속도가 증가할수록 냉각효과로 인하여 연소율은 감소하였으며, 또한 같은 무차원속도(⊽)일때 화원 크기가 커짐에 따라 연소율은 감소하였다. In this study, the l/20 reduced-scale experiments using Froude scaling were conducted to investigate the effect of longitudinal ventilation on the variation of burning rate in tunnel fires. The methanol square pool fires with heat release rate ranging from 3.57 ㎾ to 10.95 ㎾ were used. The burning rate of fuel was obtained by measured mass using load cell and temperature distribution were measured by K-type theomocouples in order to investigate smoke movement. The wind tunnel was connected with one side of the tested tunnel, and logitudinal ventilation velocity in the tested tunnel was controlled by power of the wind tunnel. In methanol fire case, the increase in ventilation velocity decreased the burning rate due to the direct cooling of fire plume. for the same dimensionless velocity(⊽), burning rate decreased as the size of pool fire increased.
중저압 물분무를 이용한 객차내 화재진압에 관한 실험 및 수치해석적 연구
양승신(Seung-Shin Yang),노재성,유홍선(Hong-Sun Ryou),김동현(Dong-Hyun Kim),정우성(Woo-Sung Jung),장용준(Yong-Jun Jang) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The present study investigates the effect of fire suppression using a mid-low pressure water mist in a carriage fire. The fire extinguishing time and temperature distributions below ceiling in the enclosed compartment of 2.9 m × 2.8 m × 5.0 m are measured by stopwatch and k-type thermocouples for various fire positions. The numerical simulations are extensively performed using Fire Dynamics Simulator (FDS, Ver. 4.0) code and the predictions are compared with experimental data. The prediction results are good agreement with the measured maximum temperature in the all cases. Whereas the predicted temperature is about 40℃ higher than the measured temperature after operating of water mist. The predicted fire extinguishing times are compared with those of measured data. Fires are extinguished within 200 seconds at the experiment in Case 2 and Case 3. But in Case 1 fire is not extinguished in the numerical simulation. The reason of the discrepancy between predicted and measured data is that a simple suppression algorithm has been implemented in FDS. due to the difference of physical phenomenon during the operating of water mist. Also, various databases of fire properties for combustible materials and more elaborate model considering the water mist are required for better predictions of the cooling and suffocation effect.
터널 화재시 배연속도가 연소율변화에 미치는 실험적 연구 - Heptane 풀화재 경우
유홍선,양승신,Ryou, Hong-Sun,Yang, Seung-Shin 한국터널지하공간학회 2005 터널기술 Vol.7 No.2
본 연구는 터널내 화재시 배연속도가 연소율 변화에 미치는 영향을 파악하기 위하여 Froude scaling에 의해 1/20 크기로 축소한 모형화재 실험을 수행하였다. 화원으로는 4.5cm~8.5cm의 헵탄을 사용하였으며 발열량은 3.71~15.6 kW이다. 연소율은 로드셀을 이용하여 산출하였고, 연기거동을 파악하기 위하여 K형 열전대를 이용하여 온도분포를 측정하였다. 풍동은 터널 상류 한쪽부분과 연결하였고, 터널 공간의 배연속도를 제어하기 위하여 풍동의 인버터를 조정하였다. 헵탄 풀화재인 경우 배연속도가 증가할수록 충분한 산소의 공급으로 연소율은 증가하였으며, 같은 무차원 속도($\bar{V}$) 일때 화원 크기가 작아짐에 따라 연소율은 증가하였다. In this study, the 1/20 reduced-scale experiments using Froude scaling were conducted to investigate the ventilation velocity of the variation of burning rate in tunnel fires. The heptane square pool fire with heat release rate ranging from 3.71~15.6 kW were used. The burning rate of fuel was obtained by measuring mass using load cell and temperature distributions were measured by K-type theomocouples in order to investigate smoke movement. The ventilation velocity in the tested tunnel was controlled by inverter of the wind tunnel. In heptane pool fire case, the increase in ventilation velocity incresed the burning rate due to the direct supply of oxygen to the fire plume. For the same dimensionless velocity($\bar{V}$), burning rate increased as the size of pool fire decreased.
안명욱(An Myoung-Uk),양승신(Yang Seungsin),위대현(Wi DaeHyeon),윤건우(Yoon Gunwoo),박다함(Park Daham) 한국콘텐츠학회 2009 한국콘텐츠학회 종합학술대회 논문집 Vol.7 No.1
증강현실은 사용자가 보고 있는 실세계의 영상과 컴퓨터가 생성한 가상의 영상이 실시간으로 합성된 영상을 제공하여 사용자에게 실세계에 대한 이해 및 현실감을 높여주는 기술 이다. 본 논문에서는 이 증강현실 기술을 의류쇼핑에 효과적으로 적용할 수 있는 방안으로써, 자동판매기라는 판매매체를 제안하여 상업적 활용방법을 모색하였고, Prototype을 제작하였다. Augmented reality is derived from virtual reality that provides combined images of what users are watching and what computers are producing to improve the understanding of reality. As an effective method of applying this augmented reality technology in clothes shopping, in this paper we suggested an automatic vending machine as a sales medium, to seek a commercial application method, and developed a prototype.