Experimental investigation on heat transfer characteristics of drug-reduction surface

The heat transfer characteristics of ribbed surfaces with rectangular channel were experimentally studied under different Reynolds numbers.The experimental results indicate that the small longitudinal ribbed surface of h=s=0.5 mm has great drag-reduction characteristics within the test range, and its drag-reduction declines with the increase of Reynolds number.As compared with heat flow in flat plate channel, the heat transfer characteristics of ribbed surface decreases in the case of 10 0001).Moreover, the heat transfer enhancement ratio increases with Reynolds number under test conditions.