On the impingement of heat transfer using swirled air jets

Experimental analyses were conducted under identical experimental conditions on the heat transfer between a constant flux flat plate and round air jet for both conventional swirled jets. Vane-type swirl generators inserted at nozzle exit used to produce swirl. The measurements performed fixed Reynolds number value (Re = 23,000) calculated tube’s inside diameter. A comparison jets with numbers of S 0, 0.19, 0.42, 0.72 was presented different nozzle-to-plate spacings Z/D 2, 6, 10. results show that decreases when distance increases. In addition, increasing increases uniformity but global transfer. At low plate-to-jet point maximum is shifted radial position depending number. Also, 6 10, stagnation region heat-transfer enhances only 0 0.19.