Abstract
The paper presents results of experimental study of the effect of air-droplet flow swirling on evaporation of moisture contained in the flow. The tests were conducted in a round 30 mm tube within the range of Reynolds number (15-50)103 at the wall heat flux ranged from 14 to 23 kW/m2 and water-spraying density 10-20 g/(m s). It was demonstrated that the swirling inserts enhance droplet deposition from the flow core to the wall and recover the evaporated liquid film at a length equal to several tube calibers. Followed by dried zones appearing at the wall again. This is due to the processes of liquid film rupture and liquid entrainment accompanying liquid deposition enhancement. The overall effect of the flow swirling appeared to be less effective than it was anticipated.
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