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Heat Transfer Through Ceramic Barrier Coatings Used in Internal Combustion Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 01, 1994 by SAE International in United States
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The paper presents the results of research concerned with heat exchange through surfaces covered with a thin ceramic layer. Theoretical analysis has been carried out to show that the presence of a ceramic layer reduces the density of heat flux flowing through the tested surface, provided the convection heat transfer coefficient is constant - the same as for surfaces without any ceramic layer. Heat exchange for three kinds of thin heat-insulting layers has been examined at a specially designed test stand. The ceramic layers were made of ZrO2 partially stabilized with Y2O3 or Ln2O3 and a plasma coated onto the base of the Al alloy. The density of heat flux, heat transfer coefficient equivalent, and heat resistance of the ceramic layer have been established. It has been proven that in the case of thin heat-insulating coatings of metal surfaces, the establishment of conductive heat resistance is not the only or the most decisive factor affecting heat exchange through such systems. Heat exchange is greatly affected by porosity, roughness and emissivity. Taking into consideration the above, it follows that knowing only the layer thickness and thermal conductivity value is not enough to make calculations of heat flux applied to surfaces with tested layer. In such cases heat exchange can be examined only by means of experimentation.
CitationMruk, A., Jordan, W., Taler, J., Lopata, S. et al., "Heat Transfer Through Ceramic Barrier Coatings Used in Internal Combustion Engines," SAE Technical Paper 941779, 1994, https://doi.org/10.4271/941779.
- Enomoto Y., Furuhama S. Heat Transfer to Wall of Ceramic Combustion Chamber of Internal Combustion Engine. Bulletin of JSME, Vol. 29, No. 250, Paper No. 840567.
- French C.C.J., Ceramics in reciprocoating internal combustion engines. SAE Paper No. 841135, 1984.
- Mruk A., Jordan W. Thin Ceramic Barrier Coatings Used in Diesel Engines. International Symposium on Small Diesel Engines. Warsaw '92. Materialy. Warszawa 1992.
- Ogawa Y., Ogasawara T., Machida H., Tsukawaki Y., Shimono K. Complete ceramic swirl chamber for passenger car diesel engine. SAE Paper No. 870650,1987.
- Assanis D.N., Badillo E. Transient Heat Condition in Low-Heat-Rejection Engine Combustion Chambers. SAE Paper No. 870156, 1988.
- Woschni G., Spindler W., Kolesa K. Heat Insulation of Combustion Chamber Walls - A Measure to Decrease the Fuel Consumption of I.C. Engines? SAE Paper. No 870339, 1987.
- Zirconia Vincenzin P. Thermal Barrier Coatings for Engine Applications. Industrial Ceramic. Vol. 10 No.3.1990.
- Jordan W., Mruk A., Stolarski B. Ceramic Thermal Barrier Coatings Plasma Sprayed on Diesel Engine Components. Transactions Automotive and Internal Combustion Engines Technology. Polish Academy of Science the Kraków Section. Vol.4. Kraków 1991.
- Raznjevic K. Tablice cieplne z wykresami. WNT Warszawa 1966.