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전자기력에 의한 자성유체의 자유표면 형성 및 상승높이 제어에 관한 연구
이은준,신진오,박명관,Lee, Eun-Jun,Shin, Jin-Oh,Park, Myeong-Kwan 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.12
In this paper, the investigation about the elevation control and the formation of the free surface of magnetic fluids is carried out theoretically and experimentally on the basis of magnetic fluids is carried out theoretically and experimentally on the basis of Rosensweig' Ferrohydrodynamic Bernoulli Equation. Governing equations of magnetic fields are solved using the concept of vector potential. While applied magnetic fields are induced by 4$\times$4 electromagnet located under the magnetic fluid, the fee surface of the magnetic fluid is formed the balance of surface force, gravity, pressure difference, magnetic normal pressure and magnetic body force. The results of numerical simulation and experiment show the formation of the free surface of the magnetic fluid. Using PID control, an experiment for the elevation control of the free surface of magnetic fluids is performed.
유한요소 해석을 이용한 자동차 압력 용기 밸브용 과류 방지 장치의 설계
이효렬(Hyo-Ryeol Lee),권대환(Dae-Hwan Kwon),신진오(Jin-Oh Shin) 한국가스학회 2021 한국가스학회지 Vol.25 No.5
기후변화에 대응하기 위해 세계적으로 이산화탄소 및 대기오염 물질 배출 규제가 점차 강화됨에 따라 내연 기관 자동차를 친환경 자동차로 전환하려는 추세이다. 이는 정부의 수소 에너지 활성화 정책에 따른 충전 인프라 구축, 충전 설비 핵심 부품의 국산화 지원으로 가속화되고 있다. 본 연구에서는 유한 요소 해석을 통해 수소 연료 전지 자동차 용기 밸브의 과류 방지 장치를 설계하고, 시험을 통해 성능을 평가하였다. 주요 시험 항목인 정수압, 연속 작동, 압력 임펄스, 누설, 작동 시험을 ISO 12619-2, ISO 12619-11의 시험 방법에 따라 수행한 결과 요구 조건을 만족함을 확인하였다. Due to the climate changing, the world’s countries are tightening regulations on CO2 and air pollutants emission to solve them. In addition, eco friendly vehicles is increasing to replace automobiles in internal combustion engine. Recently, the government is supporting the expansion of hydrogen refueling infrastructure and localization of core equipment in refueling facilities according to the hydrogen economy road map. In this study, design of the Excess flow limiting device in FCEV cylinder valve using by finite element analysis and performed performance tests on prototype. Major test results as hydrostatic strength, continued operation, operation, pressure impulse, leakage showed that the excess flow limiting device meets the performance requirements according to ISO 12619-2 and ISO 12619-11.
전자기장 해석을 이용한 CNG 차량 용기용 밸브 솔레노이드의 설계
이효렬(Hyo-Ryeol Lee),안중환(Jung-Hwan Ahn),신진오(Jin-Oh Shin),김화영(Hwa-Young Kim) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.2
Growing concerns regarding environmental pollution have increased the demand for green vehicles. Green vehicles include electric vehicles, compressed natural gas vehicles, fuel cell vehicles, and vehicles running on fuels such as bio diesel or an ethanol blend. CNG vehicles are equipped with a cylinder valve installed in a high-pressure vessel to control the CNG flow. For this purpose, the optimum design of cylinder valve solenoid is necessary to secure at driving a CNG vehicle. In this study, electromagnetic field analysis to ensure the reliable operation of the solenoid was conducted by using a Maxwell V15. The electromagnetic field analysis was performed by magnetostatic technique according to distance between magnetic poles in order to predict the attraction force. Finally, the attraction force was validated through comparison between the Maxwell results and the measurement results. From the results, the error of attraction force was found to be 2.85 N to 6.5 N under the testing conditions.
이효렬(Hyo Ryeol Lee),곽용길(Yong Kil Kwak),김화영(Hwa Young Kim),안중환(Jung Hwan Ahn),김복만(Bok Man Kim),신진오(Jin Oh Shin) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
Recently, demand of NGV (Natural Gas Vehicle) is increasing to reduce environmental pollution. The automatic valve which is manual operating type and automatic operating type as a one body is attached on High pressure fuel tank for NGV. In this Paper, To find pressure in a developed prototype auto-valve, flow analysis by ANSYS CFX is accomplished. From the flow analysis results, equivalent stress and deformations of valve body are found and the valve body strength are estimated. The gas pressure in developed prototype valve is 199.3 bar to 200bar and equivalent stress o valve body is 0.0516㎫ to 177.4㎫, deformation is 0.0768㎜ to 0.0692㎜