Distribution of effectiveness and Nusselt number over a corrugated surface impinged by a row of circular jets

Abstract

Abstract The characteristics of effectiveness and heat transfer for a row of jets impinging on a corrugated surface were experimentally investigated. The Reynolds number, Re which was calculated based on the exit velocity and the hydraulic diameter of the nozzle, was 20000 and the jet-to-target spacing, L, was varied from 2 to 10 times the jet diameter, d. The spacing between adjacent jets, Sx, was kept constant at 4d. The actual angle of impingement and jet-to-target distance were different for different jets in the row due to the corrugated surface. This results in difference in the interaction of walljets of adjacent jets, which inturn influence the local distribution of effectiveness and Nusselt number