An Experimental Study on Effects of Soot Loading and Mass Flow Rate on Pressure Drop and Heat Transfer in Catalyzed Diesel Particulate Filter

촉매 코팅 DPF의 soot loading과 유량 변화에 따른 압력강하 및 열전달에 관한 실험적 연구

  • Cho, Yong-Seok (Department of Mechanical and Automotive Engineering, Kookmin University) ;
  • Noh, Young-Chang (Graduate School of Automotive Engineering, Kookmin University) ;
  • Park, Young-Joon (Graduate School of Automotive Engineering, Kookmin University) ;
  • Kim, Duk-Sang (Graduate School of Automotive Engineering, Kookmin University)
  • 조용석 (국민대학교 기계자동차공학부) ;
  • 노영창 (국민대학교 자동차공학전문대학원) ;
  • 박영준 (국민대학교 자동차공학전문대학원) ;
  • 김득상 (국민대학교 자동차공학전문대학원)
  • Published : 2007.05.01


A diesel particulate filter causes progressive increase in back pressure of an exhaust system due to the loading of soot particles. To maintain the pressure drop caused by DPF under proper level, a regeneration process is mandatory when excessive loading of soot is detected in the filter. It is a major reason why the relation between the amount of soot and the pressure drop in a DPF becomes crucial. On the other hand, pressure drop varies with not only the soot loading but also conditions of exhaust gas such as mass flow rate. Therefore, the relation among them becomes complicated. Furthermore, the characteristics of heat transfer in a DPF is another crucial parameter in order for the filter to avoid thermal crack during regeneration period. This study presents characteristics of pressure drop under various conditions of soot loading and mass flow rate in catalyzed diesel particulate filter. This study also shows characteristics of heat transfer in DPF when high temperature gas flows into the filter. Experiments reveal that the soot loading and mass flow rate affect characteristics pressure drop independently. Experiments also indicate that the amount of coating material has little influence on pressure drop with changes in soot loading and mass flow rate. However, increased catalyst coating may lead to the improved heat transfer which is efficiency to reduce thermal stress of the filter.



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