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유전자 알고리즘에 의한 전동 유압 CAB TILTING SYSTEM의 최적설계에 관한 연구
김수태(S. T. Kim),김진한(J. H. Kim),정상원(S. W. Jung),김규탁(G. T. Kim),이호길(H. G. Lee) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.10
Generally, the commercial truck has the hydraulic cab tilting system which absorb the vibrations and impacts of the cab. The cab tilting system is equipped for the maintenance and inspection of truck. And it is very important to help user's feeling of driving and convenience. But when the truck cab is tilted, existing model has serious problem of vibration. To satisfy customer's requirements for convenience, it is necessary to improve the hydraulic truck cab tilting system. In this study, the optimization of cab tilting system is carried out by using the G.A to reduce the vibration. The results show that the vibration is reduced and the mean velocity of tilting is improved. In conclusion the improved cab tilting system can be designed and the possibility of optimal design for cab tilting system by using the GA is testified.
물과 나노유체 액적의 고온 벽면에서의 증발 특성에 관한 연구
김진한 ( J. H. Kim ),이경재 ( K. J. Lee ),정선욱 ( S. W. Jung ),강보선 ( B. S. Kang ) 한국액체미립화학회 2016 한국액체미립화학회지 Vol.21 No.4
In this study, the evaporation characteristics of water or nanofluid droplets on a heated surface was investigated by visualization of the evaporation process and evaluation of the heat transfer coefficient using the droplet temperature measured. The evaporation characteristics was compared between water and nanofluid droplets and the effects of the mass ratio of nanofluid and the inclination of heated surface were analyzed. The heat transfer rate of nanofluid droplet was higher than that of water droplet. The heat transfer coefficient was increased with the increase of the mass ratio of nanofluid. The effect of the inclination of heated surface was much higher than that of fluid type used, which indicates that the inclination of heated surface should be considered as one of influential parameters in the spray cooling process.