Investigating the effects of fin geometry on motorcycle cylinder cooling

Abstract

This work aimed to improve the heat transfer process in motor engine cylinders by adding eight fins with different shapes around such a cylinder. This process was carried out numerically Fluent software (Ansys 19.0) for different Reynolds numbers (4, 6, and 8 × 104) under constant heat flux (6, 12, 25 kw/m2). The metal used for the fin bodies was aluminium alloy, with a thermal conductivity of 237 W/m-k. Four types of fin, square, circular, elliptical, and air foil, all with the same thickness (5 mm), pitch, gap between each fin (3 mm), and surface area (0.0745 m2) were investigated. The working fluid used was air. The results indicated that the best case was seen in the cylinder with square fins, which obtained the highest value of heat transfer coefficient. The results also indicated that, more generally, the rate of the heat transfer increases when the Reynolds number increases.