- Volume 25 Issue 4
In this study, results from an experimental and numerical study of flow distribution in a close-coupled catalytic converter (CCC) are presented. The experiments were carried out using a glow measurement system. Flow distribution at the exit of the first monolith in the CCC was measured using a pitot tube under steady and transient flow conditions. Numerical analysis was done using a CF D code at the same test conditions, and the results were compared with the experimental results. Experimental results showed that the uniformity index of exhaust gas velocity decreases as Reynolds number increases. Under the steady flow conditions, flow through each exhaust pipe concentrates on a small region of the monolith. Under the transient flow conditions, flow through each exhaust pipe with the engine firing order interacts with each other to spread the flow over the monolith face. The numerical analysis results support the experimental results, and help explain the flow pattern in the entry region of the CCC.
- 이정헌, 한봉훈, 박심수, 1994, '배기다기관이 부착되어 있는 촉매에 대한 비정상유동해석에 관한 연구,' KSAE 943825
- Summers, J.C., Skowron, J.F. and Miller, M.J., 1993, 'Use of Light-off Catalysts to Meet The California LEV/ULEV Standards,' SAE Paper No.930386
- Weltens, H., Bressler, H., Terres, F., Neumaier, H. and Rammoser, D., 1993, 'Optimization of Catalytic Converter Gas Flow Distribution by CFD Prediction,' SAE Paper No.930780
- Lai, M. C., Kim, J. C., Cheng, C. Y., Li, P., Chui, G. and Pakko, J.D., 1991, 'Three-dimensional Simulations of Automotive Catalytic Internal Flow,' SAE Paper No. 910200
- Star-CD, V3.00 Manual
- 김명호, 조경민, 박심수, 허남건, 1993, '엔진 배기가스용 촉매내의 유동특성에 관한 연구,' KSAE 923925