Experimental Investigation of The Turbulence Generators on Heat Transfer Inside Heated Duct

Abstract

This work investigates the heat transfer inside a square duct experimentally in the presence of detached rectangular and triangular turbulence generators. The effect of the ratio of turbulence generators to the duct height (blocking ratio) is investigated for the values of 0.1, 0.15, and 0.2 for Reynolds number 15413. The results showed that turbulence generators have a positive effect on heat transfer. It was found that using rectangular and triangular turbulence generators augments the heat transfer by (3-9)% and (5-15)%, respectively. Also, it was revealed that increasing the blocking ratio of turbulence generators from 0.1 to 0.2 enhances the heat transfer by 6% and 10% for rectangular and triangular shapes, respectively.