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

Journal Article · · International Journal of Engine Research
ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [2];  [2];  [2];  [1]
  1. Clemson University, Greenville, SC (United States)
  2. Solution Spray Technologies LLC, Storrs, CT (United States)
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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.

Research Organization:
Solution Spray Technologies LLC, Storrs, CT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Office of SBIR/STTR Programs (SBIR/STTR)
Grant/Contract Number:
SC0019865
OSTI ID:
1997416
Journal Information:
International Journal of Engine Research, Vol. 24, Issue 7; ISSN 1468-0874
Publisher:
SAGECopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING
36 MATERIALS SCIENCE
Thermal Barrier Coatings
Combustion Chamber Deposits
Spark Ignition
Temperature Swing Coatings
Knock