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論文(논문) : 국내 항공운항에서 기상현상이 결항 및 지연에 미치는 영향 분석
이중우 ( Joong Woo Lee ),고광근 ( Kwnag Kun Ko ),권태순 ( Tae Sun Kwon ),이기광 ( Ki Kwang Lee ) 한국항공운항학회 2011 한국항공운항학회지 Vol.19 No.1
Last April, Europe was severly damaged as all social and economic activities came to a halt prompted by the cancellation of all flights resulting from volcanic ash. This exemplifies that the meteorology conditions have significant influence on the flights of airplanes. Hence, in this research the influence that the meteorology has on the domestic flights and its characteristics will be examined, and the core meteorological factors that influence flights in each airport will be drawn. In order to do this, statistical analysis on the influence that the meteorology has on flights was carried out in order to analyze the data about flight cancelation and delay and also its cause, primarily based on the Gimpo, Gimhae, and the Jeju airports. As a result, first, the meteorological factors which impact flight cancellation and delay were different among the domestic airports, and second, it was analyzed that fog was the main meteorological factor in the Gimpo airport, strong wind in the Jeju airport, and fog in the Gimhae airport. Third, between the day the flights were cancelled and delayed occurred, and the day that weren`t, the fact that there existed a difference among the actual meteorological factors was statistically drawn. With the result of such analysis, meteorological factors pertaining to the cancellation and delay of flights must be considered seperately by each airport and specialized meteorological information must be provided accordingly. Further, when selecting the position of an airport that is to be constructed in the future, implications that there is a definite need for the meteorology effect evaluation based on past meteorology data can be drawn.
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박종길 ( Jong Kil Park ),정우식 ( Woo Sik Jung ),이중우 ( Joong Woo Lee ),최효진 ( Hyo Jin Choi ),권태순 ( Tae Sun Kwon ),백종호 ( Jong Ho Back ) 한국항공운항학회 2007 한국항공운항학회지 Vol.15 No.2
Poor visibility is very important information in aviation meteorology factor, because secure safety, trust and economical efficiency increase for aircraft movements. The Incheon International Airport 4 years recent times was to period aircraft movements delay and cancellation due to meteorology is 52% and 30%. And then fog is 63% and 43% in meteorology factor. Therefore, the analysis against the economic loss size of an airline due to the fog is necessary. This study is indirectly estimated economic disaster scale of flight return and cancellation due to the fog in the Incheon International Airport from 5 to 6 March 2006. This is based on an aviation operational statistics data and meteorology observation data. Result of estimated, total 14 flights return to Gimpo, Jeju and Gimhae in this period are about 208,205,700 won. And estimated total 10 flights cancellation are about 718,657,000 won.
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철도차량 객실용 미분무 소화설비의 다중 화원 화재진압성능 평가 연구
박원희(Won-Hee Park),조영민(Youngmin Cho),김창용(Chang-Yong Kim),윤수환(Su-whan Youn),권태순(Tae-sun Kwon),이덕희(Duckhee Lee) 한국화재소방학회 2023 한국화재소방학회논문지 Vol.37 No.6
철도차량 객실을 모사하는 공간에서 미분무 소화설비의 화재 진압 성능을 철도차량 기술기준의 자동화재진압설비 시험방법의 시나리오 중 다중 화원을 활용한 성능평가 방법에 따라 성능을 평가하였다. 시험 공간 내부에 3개의 n-Heptane 화원풀을 위치하였으며 이를 점화한 후 30 s 경과 후에 미분무 소화설비를 각각 10 bar와 20 bar의 압력으로 작동시켰을 때 시험 공간 내부의 온도 변화 및 소화 소요시간, 소화 설비 정지 소요시간 등의 소화 특성을 분석하였다. 실험결과 점화 후에는 객실 내부 온도가 초기에는 상승하다가 점화 30 s 후 소화설비를 가동하면 객실 내부 온도가 상승을 멈추고 하강하기 시작하여 5 min 이내에 완전히 소화되어야 하는 화재안전기준을 만족함을 확인할 수 있었다. 이 때, 작동압력이 10 bar인 경우보다 20 bar인 경우에 온도가 더 빨리 낮아지는 것을 볼 수 있었다. 또한, 수직 온도분포 분석 결과 열부력에 의해 하부보다는 상부의 온도가 높은 것으로 나타났으며, 수평 온도 분포 분석 결과 화원 부근 및 노즐과의 거리가 먼 곳에서 온도가 높은 것으로 나타났다. 그러나, 미분무 소화설비의 노즐과 멀리 떨어진 곳에서는 온도가 더 천천히 낮아져 위험할 수 있으므로 노즐 위치 설계도 매우 중요함을 확인할 수 있었다. The fire suppression performance of a mist fire-extinguishing system in railway passenger cabin was evaluated using a performance evaluation method based on multiple fire sources. Scenarios were analyzed for a simulated space in the railway vehicle cabin of the Daegu Urban Railway Line 3 using automatic fire-suppression system methods based on railway-vehicle technical standards. Three n-heptane fire pools were positioned inside the test space. When the spray fire-extinguishing equipment was operated at 10 and 20 bar after 30 s of ignition, the variations in the temperature of the test space and the fire-extinguishing characteristics, such as the time taken to stop the fire-extinguishing equipment, were analyzed. The experimental results showed that the internal temperature of the cabin initially increased after ignition. However, when the fire- extinguishing equipment was operated 30 s after ignition, the internal temperature of the cabin stopped increasing and started to decrease, satisfying the fire safety standard that the fire must be completely extinguished within 5 min. The temperature decreased more rapidly when the operating pressure was 20 bar than when it was 10 bar. In addition, the vertical temperature distribution analysis showed that the temperature of the upper part was higher than that of the lower part, owing to thermal buoyancy. However, the design of the nozzle location is critical because the temperature decreases more slowly far from the nozzle of the mist fire-extinguishing system, which can be dangerous.
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