Evaluation of thermal barrier coatings and surface roughness in a single-cylinder light-duty diesel engine

Somhorst, Joop; Oevermann, Michael; Bovo, Mirko; Denbratt, Ingemar

doi:10.1177/1468087419875837

Cited by 15 publications

(16 citation statements)

References 15 publications

(26 reference statements)

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“…Of course, we should also note that other studies have shown an increase in UHC under low load operating conditions with both anodizing alumina and PSZ on the piston top. 62 The main concern with insulated and thermal barrier diesel engines usually focusses on effects of NOx and particulate emissions. In general, reduction in volumetric efficiency by a higher wall temperature simply results in higher soot and CO emissions at higher equivalence ratios, especially with naturally aspirated engines.…”

Section: Heat Insulation Effects Of Thermal Barrier Coatingsmentioning

confidence: 99%

A review of thermal barrier coatings for improvement in thermal efficiency of both gasoline and diesel reciprocating engines

Uchida¹

2020

International Journal of Engine Research

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Cylinder wall heat insulation using thermal barrier coatings is both an old and new thermal efficiency improvement technology for internal combustion engines. This review first outlines the history of thermal barrier coating (TBC) technologies applied to reciprocating engines from the 1970s up to the present day, by referring to several distinctive reference papers. These research efforts, however, present a number of conflicting conclusions. In order to understand why the results did not always coincide, certain key features of TBC’s studied in the reference papers were then investigated in more detail, such as thermal properties, porosity, surface roughness, and translucence/emissivity. The studies of not only the effect of TBC’s on diesel exhaust emissions, but TBC effects on gasoline and HCCI performance and exhaust emissions, are also reviewed for the investigation of manifold TBC characteristics. Finally, state of the art techniques and constraints were reviewed for experimental and numerical analysis of the heat transfer mechanism, which should be applied to TBC research.

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Section: Heat Insulation Effects Of Thermal Barrier Coatingsmentioning

confidence: 99%

A review of thermal barrier coatings for improvement in thermal efficiency of both gasoline and diesel reciprocating engines

Uchida¹

2020

International Journal of Engine Research

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“…Nevertheless, the high surface roughness that is typical for anodised TBCs, including TSWIN, was found to increase heat transfer, slow down combustion and increase THC emissions [30].…”

Section: Introductionmentioning

confidence: 98%

Plasma electrolytic oxidation thermal barrier coating for reduced heat losses in IC engines

Hegab

Dahuwa

Islam

et al. 2021

Applied Thermal Engineering

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“…The main goal is to achieve an engine with lower emissions and higher efficiency. [1][2][3] Among the solutions that are being explored to improve thermal efficiency, one is the development of innovative insulating materials to coat some engine parts, [4][5][6] such as the combustion chamber walls and the exhaust pipes manifold. However, the real global impact of coating these surfaces on the final engine performance is not clear.…”

Section: Introductionmentioning

confidence: 99%

Conjugate heat transfer study of the impact of ‘thermo-swing’ coatings on internal combustion engines heat losses

Broatch

Olmeda

Margot

et al. 2020

International Journal of Engine Research

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To comply with the very strict emissions regulation the automotive industry is succeeding in developing ever more efficient engines, and there is scope for more improvements. In this regard, some investigations have suggested that insulating the combustion chamber walls of an internal combustion engine (ICE) yield low thermal losses. Most of the literature available on this topic presents simplified models that do not allow studying in detail the coating impact on engine efficiency. A more precise approach that consists in the combination of Computational Fluid Dynamics (CFD) and Conjugate Heat Transfer (CHT) simulations is used in this paper to predict the heat losses through the combustion chamber walls of a spark ignition (SI) engine. Two configurations are considered for the single cylinder engine: the metallic case and the same engine with coated piston and cylinder head. The insulation material has a low thermal conductivity ( k[Formula: see text]1.0 W/( mK)). The numerical results are validated by comparison with the results of a 1D heat transfer model and with experimental data for a medium load operation point (3000 rpm −7 bar IMEP). The solutions obtained are analysed in detail in terms of wall temperature distribution and heat transfer. The impact of the coating on the engine efficiency is thus assessed. The CFD-CHT calculations yields very good results in terms of heat transfer prediction during the whole engine cycle.

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Evaluation of thermal barrier coatings and surface roughness in a single-cylinder light-duty diesel engine

Cited by 15 publications

References 15 publications

A review of thermal barrier coatings for improvement in thermal efficiency of both gasoline and diesel reciprocating engines

A review of thermal barrier coatings for improvement in thermal efficiency of both gasoline and diesel reciprocating engines

Plasma electrolytic oxidation thermal barrier coating for reduced heat losses in IC engines

Conjugate heat transfer study of the impact of ‘thermo-swing’ coatings on internal combustion engines heat losses

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