배기 밸브의 유동 특성 해석 평가에 대한 연구

Corresponding to the regulations with noise fuel consumption, the semi-active muffler applying the exhaust valve is becoming widely used. The exhaust valve is seated on the inside of the muffler for achieving the function of noise reduction and enhanced back pressure. In this paper, the performance of the butterfly type exhaust valve is analyzed by computational fluid dynamic method. The characteristic of the flow pattern and applied hydraulic torque is predicted on the exhaust valve with respect to a opening ratio. Also, the influence on the performance of the various operating condition and design factor has been investigated such as exhaust gas flow rate and temperature.