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쓰레기 관로이송 시스템에서의 다양한 관로형상에 대한 압력손실 평가
김동우(D.-W. Kim),장춘만(C.-M. Jang),최명덕(M.-D. Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
This paper describes flow characteristics inside a circular pipe having various duct shapes in a waste collecting system. The flow characteristics are analyzed by three-dimensional Navier-Stokes analysis and experimental measurements using a simulator of a waste collecting system. In numerical analysis, organic waste is modeled using the data obtained by site survey. Throughout the numerical simulation, pressure drop in a circular pipe is obtained and compared to the value obtained by experimental results. The pressure drop obtained by numerical simulation of the organic waste has a good agreement with that of the experimental results. It is noted that the accurate prediction of pressure drop in the waste pipe is very important to determine the performance of turbo blower used in making a suction pressure in the waste pipe. Detailed flow characteristics inside the waste pipe having various duct shapes are also analyzed and discussed.
김동우(D.W.Kim),김현수(H.S.Kim) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper. a static control strategy of CVT speed ratio is investigated. In order to operate the engine on the optima] operating region corresponding to the driver ’ s desire and the driving condition. a fuzzy control logic is used. In the fuzzy controller, S_factor is suggested which is defined as a degree of sportiness for the normal driving. Also. L_factor is suggested which determines the engine brake capacity for coating ‘<br/> Simulation results show that the fuzzy controller designed in this work selects the optimal driving mode automatically for the driver' s demand and driving condition
김동우(D.W.Kim),김현수(H.S.Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
In this paper, a dynamic control strategy of the CVT speed ratio is investigated. Firstly, dynamic models of the CVT vehicle including shift dynamics, hydraulic control valve, line pressure control module are obtained. Based on the dynamic models, simulation program "ACVTSIM" is developed. Simulation results show that the higher the speed ratio velocity, the better the kick down response and limitation of the speed ratio velocity is required for comport ride when lift foot up occurs.<br/>