Analysis of combustion chamber deposit growth on temperature swing thermal barrier coatings in a spark ignition engine

Temperature swing thermal barrier coatings (TBCs) have the potential to improve efficiency and performance through thermal management of the combustion chamber. However, the effects of combustion chamber deposits (CCDs) on the surface of the TBCs are unclear. Therefore, this paper analyzes the impac...

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Bibliographic Details
Published in:International journal of engine research 2022-12, Vol.24 (7)
Main Authors: Gandolfo, John, Gainey, Brian, Yan, Ziming, Patel, Aakash, Filipi, Zoran, Jiang, Chen, Kumar, Rishi, Jordan, Eric H., Lawler, Benjamin
Format: Article
Language:English
Subjects:
Combustion Chamber Deposits
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ENGINEERING
Knock
MATERIALS SCIENCE
Spark Ignition
Temperature Swing Coatings
Thermal Barrier Coatings
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Summary:Temperature swing thermal barrier coatings (TBCs) have the potential to improve efficiency and performance through thermal management of the combustion chamber. However, the effects of combustion chamber deposits (CCDs) on the surface of the TBCs are unclear. Therefore, this paper analyzes the impact of CCD formation on a temperature swing TBC. A piston and a heat flux probe coated with a novel material are installed in a single-cylinder research engine at a low-load condition for 62.5 h to promote CCD growth. Every 12.5 h, the performance at a knock limited condition is assessed and thermophysical property measurements on the heat flux probe are performed. Net thermal efficiency increased by 0.4% absolute after 12.5 h relative to the baseline condition, but further CCD growth caused a dithering of efficiency between the 12.5 h and baseline points. The KLSA retarded consistently throughout this period. As a result, external property measurements with the coated heat flux probe showed an improvement in the thermophysical properties of the TBC/CCD layer.
ISSN:1468-0874
2041-3149