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Multi-Physics Simulation of 6-Cylinder Diesel Engine Exhaust Manifold for Investigation of Thermo-Mechanical Stresses
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 14, 2015 by SAE International in United States
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A Coupled CFD - FE Analysis, referred as Conjugate Heat Transfer (CHT) Analysis or Fluid Structure Interaction (FSI), is very important for the processes that involves simultaneous energy exchange between solid and fluid domains. If we consider IC engines, Exhaust Manifold is one of the critical areas where above mentioned phenomenon takes place.
In this paper, temperature distribution in solid parts of exhaust manifold is obtained through Computational Fluid Dynamics (CFD) analysis which uses Finite Volume Method (FVM) for solving Navier-stokes equation and energy equation. Whereas thermal stresses are predicted through FE analysis which is based on Finite Element Methods (FEM).
It is obvious to validate CFD process before evaluating thermal stress. Therefore initially CFD results are compared with experimental results and found more than 88% correlation.
Thereafter in FE analysis, temperature field from CFD is mapped to nodes of FE model and thermo-mechanical stresses are evaluated. While evaluating stresses, material nonlinearity, and property variation with temperature is taken into account.
CitationVyas, S., Patidar, A., Kandreegula, S., and Gupta, U., "Multi-Physics Simulation of 6-Cylinder Diesel Engine Exhaust Manifold for Investigation of Thermo-Mechanical Stresses," SAE Technical Paper 2015-26-0182, 2015, https://doi.org/10.4271/2015-26-0182.
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- Fan , Q. , Kuba , M. , and Nakanishi , J. Coupled Analysis of Thermal Flow and Thermal Stress of an Engine Exhaust Manifold SAE Technical Paper 2004-01-1345 2004 10.4271/2004-01-1345
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