Numerical and Experimental Research on Thermal Insulation Performance of Marine Diesel Engine Piston Based on YSZ Thermal Barrier Coating

Although YSZ ceramic coating has been used in the field of aeroengines for a long time to protect blades from high temperature erosion, its application on marine engines is still very rare. In this study, powder was sprayed onto upper surface Al-Si alloy piston by atmospheric plasma spraying. The with or without coatings applied diesel engine bench, and ship propulsion characteristics test carried out study effect performance when sailing. results show that under 25% load, top coated about 30.91 °C higher than conventional piston. increase combustion chamber conducive better fuel cylinder engine. Therefore, tested characteristics, thermal efficiency increased 5% condition load.