Performance Evaluation of Rectangular Fins with Holes in Free Convection

Abstract

In the present work, an experimental study has been conducted on rectangular fin array with holes under free convection heat transfer. The effect of perforation diameter and angle of inclination on heat transfer from rectangular fin array have been analysed. The performance of solid fin array and the perforated fin arrays with fin spacing 6mm, fin perforation diameter of 4, 6 and 8mm, and fin inclination angle 0, 30, 45, 60 and 90º, are investigated and compared in steady state heat transfer. It was found that with the increase in the fin perforation diameter, the increase in the heat transfer rate was achieved with the advantage of weight reduction of fin array block. With the increase in fin inclination angle from 0 to 90º, an increase in heat transfer rate was also observed.

Effect of Perforation Shapes on the Heat Transfer Characteristic of Perforated Fins

“…Investigation had been done experimentally as well as CFD with 10%, 20%, and 30% perforation and concluded that total heat transfer was increased as the percentage of perforation increases and total heat transfer was maximum for 30% perforated fin array [9]. Similar trend in heat transfer with Rectangular, Trapezoidal, Triangular and Circular geometry was reported by different scientists [10][11].Present study was designed to investigate the temperature variation along fin length for number of perforations and various shapes of perforations. Solid Works Model for Square and Elliptical shape perforation having 44 in numbers was designed and imported in ANSYS 19.2 Work bench for steady state thermal analysis.…”