Library Subscription: Guest
Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
December, 14-17, 2023, Bihar, India

Effect of pipe and orifice on local heat transfer distribution on thin metal foil impinged by free surface water jet

Get access (open in a dialog) DOI: 10.1615/IHMTC-2023.240
pages 145-148


Present study experimentally investigates the distribution of local heat transfer on very thin stainless steel (SS) foil impinged by a free surface water jet. The effect of the shape of the nozzle is studied. Two different nozzles; a straight pipe nozzle and a circular orifice are considered for impingement of water jet on thin metal foil. A specially designed and constructed experimental setup is utilized to capture the localized temperature of a heated thin metal foil using the infrared thermography technique. The SS metal foil is exposed to constant heat flux with the help of an AC power supply. The experimental parameters considered in this study are nozzle diameter (d), Reynolds number (Re), and nozzle to plate spacing distance (z). The experiment is conducted for a fixed nozzle to target plate spacing ratio (z/d) of 2 and Reynolds Number 10000. The measured local temperature distribution is used to compute the local Nusselt number (Nu) distribution to non-dimensionlize the local heat transfer coefficient. Comparatively, the distribution of Nu for the orifice nozzle is found to be higher than that of the straight pipe nozzle. The orifice-type nozzle exhibits a nearly 20% higher Nusselt Number value when compared to the pipe nozzle in the stagnation region. The presence of an off-stagnation peak beyond the stagnation point is observed in both the pipe and orifice nozzle configurations.