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RISS 인기검색어
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- 저자 : 이인수(I.S. Lee) (검색결과 36 건)
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초임계압 보일러용 유화연료의 물성치와 분사압력이 분무특성에 미치는 효과
이인수 ( I. S. Lee ),정지원 ( J. W. Jung ),차건종 ( K. J. Cha ),김덕줄 ( D. J. Kim ) 한국분무공학회 2002 한국분무공학회지 Vol.7 No.3
The purpose of this study is to investigate the effect of the volume fraction of water and injection pressure on the spray characteristics of water/oil emulsified fuel injected from the pressure swirl atomizer. The mixture of light oil and water by using impeller mixer was performed. The spray characteristics such as SMD ad velocity were measured using PDPA. The injection pressures were 7.5, 100, 200 and 300kg_f/㎠ and volume fractions of water in emulsified fuel were 0, 10, 20 and 30%, respectively. The measurement sections were at 30, 60 and 90mm from injection nozzle tip. SMD and velocity of emulsified fuel were larger gradually by increasing the volume fraction of water in emulsified fuel. The spray angle was decreased and axial velocity was increased with increase in water content. It was found that the relative SMD ratio was increased more greatly than the relative axial velocity ratio in super critical pressure. The relative SMD ratio was increased and the relative axial velocity ratio was decreased with increase injection pressure at spray downstream.
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이인수(I.S. Lee),임효남(H.N. Im),최재웅(J.W. Choi) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
The purpose of this sutdy is to evaluate a defrost model for the possibility of defrosting on wheelhouse window and the heat apacity of defrosting nozzle by using the commercial CFD solver FLUENT. A detailed simulation model has been created which contains the defrosting nozzle, window and the interior/exterior forced convection boundary. In this numerical study, the heat and mass transfer coupled during defrosting and investigated the defrost time for different hot gas temperature, external wind speed and temperature condition.
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카메라 폰 렌즈 조립을 위한 비전 검사 방법들에 대한 연구
이인수(I. S. Lee),김진오(J. O. Kim),강희석(H. S. Kang),조영준(Y. J. Cho),이규봉(G. B. Lee) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
The assembly of camera lens modules for the mobile phone has not been automated so far. They are still assembled manually because of high precision of all parts and hard-to-recognize lens by vision camera. In addition, the very short life cycle of the camera phone lens requires flexible and intelligent automation. This study proposes a fast and accurate identification system of the parts by distributing the camera for 4 degree of freedom assembly robot system. Single or multi-cameras can be installed according to the part"s image capture and processing mode. It has an agile structure which enables adaptation with the minimal job change. The framework is proposed and the experimental result is shown to prove the effectiveness.
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전산유체역학을 활용한 자주도하장비 문교 상태의 저항 및 자항 성능 평가
이인수(I. Lee),서정화(J. Seo),석우찬(W. Seok),유재훈(J. Yoo),이강일(K.I. Lee),김도헌(D.H. Kim),이남훈(N. Lee),이성오(S.O. Lee),이신형(S.H. Lee) 한국전산유체공학회 2020 한국전산유체공학회지 Vol.25 No.4
In this study, numerical simulations were conducted for resistance and self-propulsion performance for an amphibious rig in ferry mode. They were performed under conditions of h/T=4.5, 2.0 and head angles of both 180 and 90 degrees using SNUFOAM, based on open source CFD toolkit OpenFOAM. A double body method was adopted for free surface flow. Thrust was modeled with a body force method in self propulsion tests. The results of resistance tests showed drag forces according to the depth and head angle conditions and presented differences in the drag forces. In order to investigate the differences, the pressure, velocity, and vorticity distribution near the amphibious rig were identified. From self propulsion tests results, the thrusts and powers at the self propulsion point were estimated and compared with the thrust diagram to confirm the self propulsion performance.
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