Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Numerical Study on the Flow Characteristics in the Catalytic Muffler with Different Inlet and Outlet Configurations

입구 및 출구 형상 변화에 따른 촉매 삽입형 머플러 내부의 유동 해석

  • An, Tae Hyun (Department of Aerospace Engineering, Chonbuk National University) ;
  • Lee, Seung Yeop (Department of Aerospace Engineering, Chonbuk National University) ;
  • Park, Yun Beom (Department of Automotive Engineering, Jeju College of Technology) ;
  • Kim, Man Young (Department of Aerospace Engineering, Chonbuk National University)
  • 안태현 (전북대학교 항공우주공학과) ;
  • 이승엽 (전북대학교 항공우주공학과) ;
  • 박윤범 (제주산업정보대학 자동차과) ;
  • 김만영 (전북대학교 항공우주공학과)
  • Received : 2012.06.13
  • Accepted : 2013.03.27
  • Published : 2013.09.01
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Abstract

Lack of the space in many diesel vehicles make it difficult to design and install the catalytic muffler to reduce emissions. For this reason, inlet part of the catalytic muffler is made of L-type which has lower flow uniformity than conventional I-type, and catalytic muffler has complex internal structure by various insertions, which affect the flow uniformity and pressure drop of the systems. In this work, the flow characteristics such as flow uniformity and pressure drop have been numerically investigated by changing such various geometries as inlet shape, porosity, and outlet shape inside the muffler with the three-dimensional turbulent incompressible flow solver. Total 4 different cases are considered in order to find optimal configurations of the catalytic muffler in view of high flow uniformity and low pressure drop. The results show that Case 2 which has no induction cone and outlet perforated pipe has higher uniformity index and lower pressure drop than others considered in this work.

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References

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