Effects of thermal barrier coating porosity on combustion and heat losses in a light duty diesel engine
Journal article, 2024

Plasma sprayed thermal barrier coatings (TBCs), applied in internal combustion engines, can have a profound impact on the apparent rate of heat release. Upon fuel jet contact with the piston wall, the heat loss seems to increase compared to an uncoated piston and combustion appears delayed. Permeable porosity of plasma sprayed TBCs is identified as one of the possible causes for this unwanted effect. In this article the impact of open porosity and sealing of the TBC surface are investigated with single cylinder engine experiments and with simulations. Based on the results, a mechanism is presented to explain the observations.

sealing

heat transfer

insulation

combustion engine

crevice effect

Thermal barrier coating

porosity

fuel entrainment

Author

Joop Somhorst

Chalmers, Mechanics and Maritime Sciences (M2), Energy Conversion and Propulsion Systems

Volvo Group

Michael Oevermann

Brandenburg University of Technology

Chalmers, Mechanics and Maritime Sciences (M2), Energy Conversion and Propulsion Systems

International Journal of Engine Research

1468-0874 (ISSN) 2041-3149 (eISSN)

Vol. 25 5 940-958

Areas of Advance

Transport

Energy

Subject Categories

Energy Engineering

Manufacturing, Surface and Joining Technology

DOI

10.1177/14680874231215526

More information

Latest update

5/11/2024