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1 Journal of KONES

1 2006

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Thermal barrier influence on temperature and stress fields in an internal combustion engine piston

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Kurowski Z. , Niezgoda T. , Szymczyk W.

tom Vol. 13, No. 2

259-266

The paper presents results of numerical Finite Element analysis of an internal combustion engine piston with a thermal barrier made of zirconia, subjected to thermal and thermo-mechanical loadings. Special emphasis was laid on investigation of the impact of the surface coating on the fields of temperature, heat fluxes, residual stresses and stresses in the coated piston in the working conditions. For this a purpose, a methodology of developing FEM numerical models of a piston with a surface coating was elaborated, several 2D and 3D FEM models of the piston with the coating were built, and FEM analysis of the models, subjected to thermal and thermo-mechanical loadings was performed. The results of computations proved high efficiency of the coating as a thermal barrier. The working temperature in some areas inside the piston with a coating showed a huge decrease and was 40% lower as compared with the temperature for the same piston without a coating. At the same time, the heat fluxes inside the piston were reduced almost ten times. The developed methodology of modelling and simulation may lead to obtain higher thermal resistance, strength and durability of internal combustion engines and their elements with thermal barriers in all fields of application, including aviation.