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- 저자 : 남충우 (검색결과 74 건)
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남충우,김현철,김재광,박문제,남유주 한국자동차공학회 2023 한국 자동차공학회논문집 Vol.31 No.7
Fossil fuel phase-out is a main issue which should be solved for all sector of mobility. Especially for the aviation sector, a hydrogen fuel cell-based aircraft is under development according to its inevitable emission effect and in following to carbon offsetting and reduction scheme for international aviation(CORSIA) by international civil aviation organization. In this study, shape change of hydrogen supply valve has been experimented with flow and magnetic field analysis under aviation running circumstances. Comparing to a normal vehicle driving, aviation is running under different circumstances such as altitude, temperature, pressure and etc. K-epsilon model has been used for the numerical analysis. With redesigning suction force about 10 % and spring constant, it has been improved for hysteresis deviation of hydrogen supply va
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수소충전소용 유량제어 밸브의 차압에 따른 유동특성에 대한 수치해석적 연구
남충우(Chung-Woo Nam),김락민(Rak-Min Kim),김현효(Hyun-Hyo Kim) 한국가스학회 2021 한국가스학회지 Vol.25 No.2
With the recent growing interest in eco-friendly cars, as interest in eco-friendly cars increases, interest and purchase of hydrogen fuel cell vehicles that do not emit pollutants are increasing. Recently, the government is supporting the expansion of hydrogen charging station and localization of core parts according to the governments hydrogen energy dissemination policy. In this study, the flow characteristics of the hydrogen flow control valve were investigated. As the differential pressure increases, the mass flow rate and flow coefficient tend to be different from the volume flow rate. And it was confirmed that it affects the hydrogen temperature due to the nozzle effect in the bottleneck section, and the change in density affects the mass flow rate.
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