This paper investigates the potential of coated pistons in reducing fuel consumption and pollutant emissions of a 1.6l automotive diesel engine. After a literary review on the state-of-the-art of the materials used as Thermal Barrier Coatings for automotive engine applications, anodized aluminum has been selected as the most promising one. In particular, it presents very low thermal conductivity and heat capacity which ensure a high “wall temperature swing” property. Afterwards, a numerical analysis by utilizing a one-dimensional Computational Fluid Dynamics engine simulation code has been carried out to investigate the potential of the anodized aluminum as piston Thermal Barrier Coating. The simulations have highlighted the potential of achieving up to about 1% in Indicated Speciﬁc Fuel Consumption and 6% in heat transfer reduction. To conﬁrm the simulation results, the coated piston technology has been experimentally evaluated on a prototype engine and compared to the baseline aluminum pistons. Despite the promising potential for Indicated Speciﬁc Fuel Consumption reduction highlighted by the numerical simulation, the experimental campaign has indicated a slight worsening of the engine eﬃciency (up to 2% at lower load and speed) due to the slowdown of the combustion process. The primary cause of these ineﬃciencies is attributed to the roughness of the coating.
Numerical and experimental investigation of a piston thermal barrier coating for an automotive diesel engine application / Caputo, Sabino; Millo, Federico; Boccardo, Giulio; Piano, Andrea; Cifali, Giancarlo; Pesce, Francesco Concetto. - In: APPLIED THERMAL ENGINEERING. - ISSN 1359-4311. - 162(2019), p. 114233.
|Titolo:||Numerical and experimental investigation of a piston thermal barrier coating for an automotive diesel engine application|
|Data di pubblicazione:||2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.applthermaleng.2019.114233|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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