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

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