Volume 19 No 6 (2021)
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HEAT TRANSFER ANALYSIS OF ENGINE CYLINDER OF FINS OF VARYING GEOMETRY AND MATERIAL
Rajneesh Kumar, Anurag Kumar, Shivangi Dixit, Aditya Veer Gautam
Abstract
The Indian two-wheeler market ranks as the worlds second largest, comprising three main segments: motorcycles, scooters, and mopeds. In recent years, significant growth has been observed in the motorcycle segment, attributed to its ability to navigate rough road conditions effectively. Indian motorcycles commonly employ air-cooling for their engines, chosen for its lightweight and simple construction of the engine cylinder block. Air-cooled engines dissipate heat through cooling fins, which facilitate the transfer of heat away from the engine as air flows over them. However, the low rate of heat transfer through cooling fins presents a challenge in this cooling method. Engine cylinders, being subjected to high temperature variations and thermal stresses, utilize fins on their surfaces to enhance heat dissipation. Thermal analysis of these fins aids in understanding the heat dissipation within the cylinder. This project aims to improve heat dissipation rates by utilizing air, an invisible working fluid, to increase the surface area for cooling. Designing complex engines with extensive cooling fins presents challenges, making it essential to analyse thermal properties by varying fin geometry and materials. Extended surfaces, such as fins, are commonly used in engineering applications to enhance heat transfer between a hot surface and a coolant. When fins experience significant temperature differences between the base and surrounding fluid, precise evaluation of their thermal performance requires consideration of the temperature-dependent thermal conductivity of the fin material. Rectangular profile fins are preferred in many systems due to their ease of manufacturing and cost-effectiveness. However, in applications prioritizing lightweight fin structures, such as airborne and space systems, curve parabolic profile fins, which result in lighter structures, are favoured over rectangular fins. Nevertheless, curve parabolic fins are challenging and costly to manufacture, and their sharp edges pose safety risks. Triangular fins, as a viable alternative to curve shapes, are also considered.
Keywords
fin, thermal conductivity of material, heat flux etc
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