Thermal and CFD Analysis of Engine Fins for Different Materials with Varying Slot Sizes and Shapes

The engine is the heart of an automobile which is subjected to high temperature variation and thermal stresses. The high temperatures produced in the engine cylinder needs to be reduced for effective working of the engine. If the heat is not dissipated properly then it causes to development of the detonation and finally decrease the working efficiency hence, heat dissipation rate from the cylinder is one of the important task. These high temperatures are reduced by introducing the appropriate cooling mechanism air cooling, water cooling, oil cooling. An air cooled motorcycle engine release the heat produced by engine to the atmosphere through forced convection mode. Fins are provided on outer surface of the cylinder block. Fins are the extended surface which helps in dissipation of the heat generated in the engine. The heat dissipation depends upon the velocity of air, geometry of the fin and the thermal conductivity of the materials used. In this project an attempt is made to find out the thermal analysis and CFD simulation of cylinder block with fins for different materials like Al6061, Al2014, Al a380 and also changes are done in the design of fins to increase the heat dissipation rate. The changes made in the fins are increases the tip thickness and provides slots of different dimensions and shapes like rectangular slot, triangular slot, semicircular slot. The slot sizes are varied while keeping the fin size and the number of fins same. The 3D modelling is done on Creo 2.0software and the analysis part and CFD is done on ANSYS software for steady state condition. Results of the various analysis done shows that engine cylinder with aluminium alloy 2014 with semicircular slot of area 50 mm2 dissipates more heat when air flows through the fins