유니프로우 소기식 두상밸브형엔진에서 RNG 난류모델의 평가와 과급압력변화가 소기유동에 미치는 영향

Assessment of RNG Turbulence Model and the Effect of Inlet Pressure on Scavenging Flow

Many studies for improving a scavenging efficiency have been executed by using simulative manner. This paper addresses to a scavenging process in a uniflow two stroke cycle engine. The Processes are simulated for scavenging pressure variation, after the assessment of turbulent models. The results have shown that employing RNG k-$\varepsilon$ model gave more accurate velocity profiles near the cylinder wall compared with the standard k-$\varepsilon$ model and the charged fresh air has increased with the scavenging pressure increase.