http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
장일훈(Ilhoon Jang),송시몬(Simon Song) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Slot coating is one of the frequently used coating processes in display and battery industry due to the high accuracy, fast production rate and cost effectiveness. An important issue is the prediction of coating stability that is difficult due to lack of reliable theoretical models. A frequently used model is viscocapillary model that evaluates the coating stability using a force balance between surface tension and viscous force. Although the model provides good physical insight, its predictions are inaccurate for large capillary number flows because it doesn’t consider the inertia of the ink flow. Thus, we propose an improved viscocapillary model which accounts for inertia effects in the coating bead. We found that the model predictions are in good agreement with numerical results on the ink flow of slot coating for a wide range capillary number.
장일훈(Ilhoon Jang),장철훈(Chulhoon Jang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Nature Aspiration(N/A) Engine can increase volume efficiency through supercharger and turbocharger systems. Supercharger has an advantage that reaction by throttle change is very fast, because it is linked directly to crankshaft. However, because supercharger linked directly to crankshaft, there is a disadvantage that there is damage of engine output and has a fixed boost pressure. Therefore, Electric Supercharger, driven by a DC motor, can control the boost pressure without damage of engine output and independently with a pulley ratio. In this paper, the supercharger characteristics were identified and a electric supercharger controller was designed to drive the DC motor. To keep a target pressure, PI control logic was embedded on a microprocessor. The electric supercharger system was installed in a hand-made automobile with a 125㏄ single cylinder engine. Performance of the system was verified under conditions that boost pressure ranges from 0 bar to 0.3 bar.