Thermal Coating
PAPER ON
THE EFFECTS OF THERMAL BARRIER COATINGS
ON
DIESEL ENGINE PERFORMANCE
PRESENTED BY
MOHAMED MUKTHAR G
III B.E MECHATRONICS
FROM
SRI KRISHNA COLLEGE OF ENGINEERING AND TECHNOLOGY KUNIAMUTHUR, COIMBATORE-641008. mohdmukthar03@gmail.com
ABSTRACT: The knowledge of the heat transfer in the parts of internal combustion engine is most important in order to ascertain the points of high temperature variation and hence to determine to optimum conditions where the parts of the engine subject to high thermal load. The heat transfer in engine affects the performance and emission. Among the components exposed to heat load, piston of internal combustion engine is subject to maximum thermal stress. The large temperature gradient the piston will cause structural deformation deterioration of lubricant and increase the clearance between the cylinder liner and piston there by causing more noise, vibration degrees in the engine service life, the non- uniform temperature gradient arise owing damage of piston especially crown region. Experimental study is conducted on single cylinder 5hp diesel engine in order to find the improved performance when a ceramic coating is given especially in the piston crown. Among the ceramics, Yttria partially stabilized Zirconia (YPSZ) is being favoured for diesel engines since its co efficient of thermal expansion is close to those of metals used in piston. This avoids problems relating to difference in thermal expansion between metallic and thermal parts which also increases its durability. Compared to the conventional engine (without coating over the piston crown) the modified engine (with ceramic coating over the piston crown) did not produce any observable knock in the engine, no significant
THE EFFECTS OF THERMAL BARRIER COATINGS
ON
DIESEL ENGINE PERFORMANCE
PRESENTED BY
MOHAMED MUKTHAR G
III B.E MECHATRONICS
FROM
SRI KRISHNA COLLEGE OF ENGINEERING AND TECHNOLOGY KUNIAMUTHUR, COIMBATORE-641008. mohdmukthar03@gmail.com
ABSTRACT: The knowledge of the heat transfer in the parts of internal combustion engine is most important in order to ascertain the points of high temperature variation and hence to determine to optimum conditions where the parts of the engine subject to high thermal load. The heat transfer in engine affects the performance and emission. Among the components exposed to heat load, piston of internal combustion engine is subject to maximum thermal stress. The large temperature gradient the piston will cause structural deformation deterioration of lubricant and increase the clearance between the cylinder liner and piston there by causing more noise, vibration degrees in the engine service life, the non- uniform temperature gradient arise owing damage of piston especially crown region. Experimental study is conducted on single cylinder 5hp diesel engine in order to find the improved performance when a ceramic coating is given especially in the piston crown. Among the ceramics, Yttria partially stabilized Zirconia (YPSZ) is being favoured for diesel engines since its co efficient of thermal expansion is close to those of metals used in piston. This avoids problems relating to difference in thermal expansion between metallic and thermal parts which also increases its durability. Compared to the conventional engine (without coating over the piston crown) the modified engine (with ceramic coating over the piston crown) did not produce any observable knock in the engine, no significant