배기가스 정화장치의 입ㆍ출구 형상에 따른 배압 및 유동특성에 관한 연구

The pressure drop and the uniformity of incoming exhaust gas are becoming more and more important design factors to develop catalytic converter. The catalytic converter optimizing these factors might minimize engine power resistance and maximize the performance and durability of catalytic converter. In this regard, this paper is dealt with the catalytic converter's performance depending upon the geometry of inlet and outlet parts, and inferred the best combination of inlet and outlet geometry to optimize converter performance. Good advantage is taken of numerical analysis for estimating reciprocal influences of each factor. That analysis shows that the pressure drop and flow uniformity is subject to the inlet and outlet geometry of catalytic converter, and the effective inlet and outlet geometry of converter is a concave shape and a S-shape part respectively in the view point of the pressure drop and flow uniformity.