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김대현 ( Dae Hyun Kim ),이근오 ( Keun Oh Lee ) 한국안전학회(구 한국산업안전학회) 2014 한국안전학회지 Vol.29 No.3
Accidents involving portable ranges occurred total 133 cases for the last five years(2008~2012). It accounted for18.0% of all gas accidents(739 cases). Major causes of accidents are using of excessive hot grill, leaving a butane can near fire and overheating of a butane can during cooking. In this study, it is a desire to investigate the relationship between thermal behavior me chanism depending on characteristics of cooking equipment materials of portable gas ranges. It shows that slope of temperature change curve correlates with difference of heat capacity on thermal behavior characteristics experiment depending on materials of cooking equipment. In conclusion, temperature characteristics appear differently depending on variables such as materials of cooking equipment. Especially, it is necessary to restrict using cooking equipment made of stones, because it is very dangerous that temperature of can is rapidly increasing caused by high heat capacity of stone
[論文] 旋回流를 同伴하는 亂流擴散火焰에 關한 實驗的硏究(未燃燒 流動場의 流動特性)
양옥용(Ok-Yong Yang),이근오(Keun-Oh Lee) 한국자동차공학회 1985 오토저널 Vol.7 No.2
Swirling flows have commonly used for a number of years for the stabilization of high-intensity combustion processes.<br/> In general, these swirling flows are poorly understood because of their complexity. This paper, therefore, deales with the experimental study on turbulent diffusion with swirling flow in unburned flow field by using a model combustor.<br/> The purpose of this study is to investigate quantitatively the swirling air jets issuing from vane swirlers. The fundamental experiments have been performed for the local velocity dis-tribution, turbulence intensity and Schlieren photograph in the jets issuing into the atmosphere.
ATO 시스템 전동차의 ECO 운행패턴 적용에 관한 연구 (시뮬레이션 결과를 중심으로)
김규중 ( Kyu Joong Kim ),이근오 ( Keun Oh Lee ),김주용 ( Ju Yong Kim ) 한국안전학회(구 한국산업안전학회) 2013 한국안전학회지 Vol.28 No.2
This study focuses on finding ECO driving patterns which consider driving safety of the ATO system train and reliability and which optimize efficiency of the driving energy consumption. Research results derived by performing simulation of those 5 models show that the emergency braking which affects safety of passenger and the machinery is minimized, and safe driving speed is maintained by the prohibition of drastic acceleration/deceleration, coasting and constant-speed driving. Therefore if this result is applied to the urban railway train by amending or making ATO program to save energy usage that improve environmental quality, its effects as ECO driving pattern is huge.
현행 ATO 시스템 전동차 운행패턴의 문제점 분석을 통한 ECO 운행패턴 도출방안 연구
김규중 ( Kyu Joong Kim ),이근오 ( Keun Oh Lee ),김주용 ( Ju Yong Kim ) 한국안전학회(구 한국산업안전학회) 2013 한국안전학회지 Vol.28 No.3
This study focuses on finding ways to derive train′s optimal ECO driving pattern, which can improve the ride quality and reduce driving energy consumption with keeping the time interval between the stations. As research method, we compared difference of currently ope-rating train′s ATO and MCS driving patterns, and concentrated upon the things need to consider in simulation in order to improve the existing pattern of ATO driving pattern′s issues with securing the train operation safety. Determining driving pattern minimizing energy consumption by controlling powering within speed limit and controlling switching to coasting at appropriate point considering the track conditions for each section, and determining braking control starting time considering ride comfort and precise stopping is considered to be most important.