Convective Heat Transfer Study with an Array of Air Jets
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Abstract
The primary goal of this experimental investigation is to study the effects of various geometrical factors on heat transfer. The tests were performed by changing the heat flux from 0.025 to 0. 2K W/cm^2 and a jet Reynolds number from 2500 to 4500 with a jet exit to target object distance of 10 and 20mm.The test plate is a copper material of size 2mm by 2mm with a negligible thickness, a copper material is taken for its good thermal properties. In all the tested cases it is noticed that as the heat flux surges the plate temperature rise which in turn increase the heat transfer co-efficient. The value of h increases slowly with rise in Reynolds number in all the cases tested. The heat transfer results obtained from this research work is related by means of the simple relationship Nuavg =0.7 q^0.8 Re^0.25.
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