Experimental investigation of fin heat transfer characteristics in different condition

Document Type : Research Article

Authors

Department of Mechanical Engineering, Khatam al-Anbia Air Defense University, Tehran, Iran

Abstract

Applying heat sinks as extended surfaces plays a significant role in cooling various industrial equipment. This study investigates the impact of heat transfer parameters of fins, such as practical geometry, wall heat flux, coolant velocity, and the angle at which the coolant flow interacts with the fin. The geometry of the fins includes rectangular and triangular shapes, with a heat flux range of approximately 4.6-18.5 kW/m2, coolant velocities ranging from 1-2 m/s, and angles of 0º, 45º, and 90º between the fin position and cooling flow direction. Aluminum, known for its high conductivity, was chosen as the material for the fin structure, with air serving as the primary cooling flow. The study found that triangular fins exhibited a higher convective heat transfer rate than rectangular fins, approximately 47.4% higher on average across all conditions. However, rectangular fins dissipated heat from the wall more effectively. Pressure drop was assessed by comparing cooling flow velocities associated with each fin in various positions. Results revealed that the sharp tip of triangular fins reduced the vorticity effect, increased average flow velocity, and decreased pressure drop. Additionally, rectangular fins were approximately 10.4% more efficient on average than triangular fins. The study also concluded that the impact angle had a negligible effect on the efficiency of both rectangular and triangular fins.

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References

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AUT Journal of Mechanical Engineering
Volume 8, Issue 2
2024
Pages 151-180

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