Experimental Investigation of Pressure Drop in Stationary Square Channel with 90° Ribs: Experimental Analysis of Rib-induced Pressure Drop in Square Duct

Abstract

The influence of attached ribs on wall of square duct and the pressure drop has been experimentally investigated in this study. The combined effects of geometrical parameters of ribs on friction factor are reported for the Reynolds number based on the duct hydraulic diameter in the range of 5000-25000. The geometrical parameters of ribs are systematically varied in this study were the pitch to rib height ratio (p/e), rib height to duct hydraulic diameter ratio (e/Dh), Results are reported for 0.2 ≤ e/Dh ≤ 0.4, 6 ≤ p/e ≤ 12, in duct having aspect ratio AR = 1. For attached ribs the friction factor attain maxima corresponding to pitch ratio (P/e) value of 10 experimental result reveals that the friction factor is increasing with increasing e/Dh.