Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Study on Thermal Stress and Flow Analysis at Exhaust Manifold of Car

자동차 배기 매니폴드에 있어서의 열응력과 유동해석에 관한 연구

  • Cho, Jaeung (Department of Mechanical & Automotive Engineering, Kongju National University) ;
  • Han, Moonsik (Department of Mechanical & Automotive Engineering, Keimyung University)
  • 조재웅 (공주대학교 기계자동차공학부) ;
  • 한문식 (계명대학교 기계자동차공학과)
  • Received : 2013.06.04
  • Accepted : 2013.08.19
  • Published : 2014.03.01
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Abstract

This study investigates fluid flow and thermal stress at automotive exhaust manifolds as model 1 and 2. The maximum displacements happen at joint part connected with 4 pipes and upper middle of both parts in cases of model 1 and 2 respectively. At inner surface of the part connected with engine, maximum equivalent stresses of 991.85 and 698.96 MPa are shown in cases of model 1 and 2 respectively. As maximum velocities at the outlet at model 1 are shown at 19.46 and 14.61 m/s in cases of model 1 and 2 respectively, model 1 has more pressure drop than model 2. As result, model 2 has less pressure drop than 1. Model 2 has less deformation and stress than model 1. Model 2 has also less pressure drop than model 1. Therefore model 2 has more strength durability than model 1. This study result is applied with the design of safe automotive manifold and it can be useful to improve the durability by predicting prevention against the deformation due to exhaust gas.

Keywords

References

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