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RISS 인기검색어
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- 저자 : 홍상욱(S.W. Hong) (검색결과 2 건)
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홍상욱,류호선,Hong, S. W.,Rew, H. S. 한국유체기계학회 2000 한국유체기계학회 논문집 Vol.3 No.4
Numerical analysis using three dimensional finite volume method for the discretization, adaptive grid method for the numerical accuracy, multiple rotating frame method for the rotating body and the standard $k-{\epsilon}$ model for the turbulent flow was performed to understand the heat transfer phenomena and to improve the efficiency of the scroll compressor. The temperature measurement was carried out under ARI condition. It was found that the fluid temperature in the compressor was predicted accurately while the temperature of the motor coil showed large discrepancy between the calculation and experiment due to the large anisotropy of the conductivity and non homogeneity. We found that the efficiency of the compressor depends on the inlet temperature of the compressing part and the flow pattern around the inlet region of the compressing part influences the inlet temperature due to high surface temperature of the main frame. The efficiency of the compressor using Coanda effect is higher than the previous one because the smooth suction at the inlet region of the compressing part leads to low heat transfer to the refrigerant of the compressor.
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자동차용 직접분사식 디젤엔진 실린더헤드의 응력분포 측정
이교승(K.S. Lee),홍상욱(S.W. Hong),이진호(Jinho Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
Temperature and stress distribution of a cylinder head which is one of the combustion chamber components are very important factors for the new engine design. In this study, for the purpose of measuring stresses of a cylinder head firing face, high-temperature strain gages are installed around intake and exhaust valves of 2,4-cylinder heads. Stress distribution is measured for various range of engine speeds and engine loads. New experimental method is introduced into the research region where numerical analyses have been the main stream and will present verification data for the propriety of numerical analyses.
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