Experimental study of flat plate cooling using draft induced by a submerged radial jet
An experimental research has been conducted for evaluating heat transfer in a modified configuration of a submerged radial jet, so it was possible to extract the fluid directly under the nozzle, looking for an improvement in the heat transfer rate. The experiments were conducted for the following ranges of the phenomenon governing parameters: 16 mm nozzle diameter, nozzle to plate distance ranging from 10 mm to 20 mm, Reynolds number ranging between 10,000 and 20,000, and heat density of 10.2 – 13.6 kW/m2. The heat transfer coefficient as well as Nusselt number for the different conditions under study were estimated using the temperature distribution obtained from a data acquisition device and appropriated post-processing. The use of fluid extraction through induced draft generated a significant increase in heat transfer in the area under the nozzle, obtaining values ranging from 290 up to 1500 W/m2.°C.
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