Effects of thermal barrier coating porosity on combustion and heat losses in a light duty diesel engine
Artikel i vetenskaplig tidskrift, 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

Författare

Joop Somhorst

Chalmers, Mekanik och maritima vetenskaper, Energiomvandling och framdrivningssystem

Volvo Group

Michael Oevermann

Brandenburgische Technische Universität

Chalmers, Mekanik och maritima vetenskaper, Energiomvandling och framdrivningssystem

International Journal of Engine Research

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

Vol. 25 5 940-958

Styrkeområden

Transport

Energi

Ämneskategorier

Energiteknik

Bearbetnings-, yt- och fogningsteknik

DOI

10.1177/14680874231215526

Mer information

Senast uppdaterat

2024-05-11