Thermal Deformation Analysis of Exhaust Manifold for Turbo Diesel Engine in Consideration of Flange Design

터보 디젤 엔진용 배기매니폴드의 열변형 해석

  • 김범근 (인제대학교 기계자동차공학부) ;
  • 이은현 (현대기아 연구개발본부 승용디젤엔지시험팀) ;
  • 최복록 (원주대학 자동차기계과)
  • Published : 2007.03.01


Thermal deformation of cast iron exhaust manifold for turbo diesel engine is investigated by finite element analysis (FEA). The FE model included the temperature dependent material properties as well as the interactions between exhaust manifold, cylinder head and fasteners. It also considers the sliding behavior of the flanges of exhaust manifold on cylinder head when either expansion or contraction of the exhaust manifold exceeds the fastener pretension. The result of analysis revealed that remarkable thermal deformation along the longitudinal direction. Compressive plastic deformation at high temperature remained tensile stress in manifold and resulted in longitudinal contraction at ambient temperature. The amount of contraction at each fastener position was predicted and compared with experimental results. Analysis results revealed that the model predicted deformation qualitatively, but more elaborated cyclic hardening behavior would be necessary to predict the deformation quantitatively.


Turbo Diesel Engine;Exhaust Manifold;Fea;Plastic Strain;Thermal Deformation


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