A Study on the Fluid Flow Characteristic in Catalytic Converter for Various Inlet and Outlet Header Shapes

입.출구 형상변화에 따른 촉매변환기 내의 유동특성에 관한 연구

  • 이은호 (아주대학교 대학원) ;
  • 이철구 (아주대학교 대학원) ;
  • 유재석 (아주대학교 기계 및 산업공학부) ;
  • 이종화 (아주대학교 기계 및 산업공학부)
  • Published : 1999.09.01

Abstract

In the design of catalytic converter, velocity distribution is more important than pressure drop because monolith pressure drop is about 80% of overall pressure drop. For the catalytic converter with single diffuser, pressure drop is decreased as the angle of diffuser decrease, but when the angle is below 18$^{\circ}$, the effect is almost negligible . For the catalytic converter with double diffuser, variation of the angle of the first diffuser shows the same trend as the pressure drop while the shape of diffuser gives little influence on that The outlet shape gives negligible effect on the pressure drop and velocity . distribution . Results show that recirculation region of commercial model is aoubt 30% of the total area in the front of monolith. For the catalytic converter with Model 11 that was presented in the study, recirculation region was not detected more uniform velocity distribution was obtained, and pressure drop was also decreased.

Keywords

References

  1. SAE 912372 Sources of Monolith Catalytic Converter Pressure Losses Wendland. D. W.;Sorrell, P.L.;Kreucher,J.E.
  2. CAPOCI Catalysis and Automotive Pollution Control A. Cricq(et al.)
  3. ASME v.113 A Study of Inlet Flow Distortion Effects on Automotive Catalytic Converter G. Bell;V. Rocco;M. Maggiore
  4. SAE 880282 A Three-Dimension Model for the Analysis of Transient Thermal and Conversion Characteristics of Monolithic Catalytic Converters David K. S. Chen;Edward J. Bisselt;Se H. oh;David L.;Van Qstrom
  5. SAE 910610 Light-Off Performance of Catalytic Converters : The Effect of Heat/Mass Transfer Characteristics Micheal J. Ryan;E. Robert Becker;Kyiacos Zygourakis
  6. SAE 740244 Flow Through Catalytic Converter-An Analytical and Experimental Treatment J .S. Howitt;T. C. Sekella
  7. SAE 861554 visualization of Automotive Catalytic Converter Internal Flow D. W. Wendland;W. R. Mattes
  8. SAE 922340 Effect of Header Truncation on Monolith Converter Emission-Control Performance D. W. Wendland;W. R. Mattes;P. L. Sorrell
  9. SAE 952398 Reducing Catalytic Converter Pressure Loss with Enhanced Inlet-Header Diffustion Daniel W. Wendland;John Kreucher;Eric Andersen
  10. 한국에너지학회 v.4 no.2 모노리스 촉매담체내의 유체유동에 관한 실험적 연구 최희탁;목재균;이은호;유재석;이종화