This paper is concerned with heat transfer to air passing through the axial cooling ducts of rotors. The measurements have yielded data for a range of axial to rotational velocities and of duct spacing, pitch-circle diameter, and length-to-diameter ratio.
The results, in terms of the ratio of rotating to stationary heat transfer coefficients, show the important parameters which govern the increase in heat transfer due to rotation. Under certain conditions, an increase in heat transfer of 100 per cent is achieved.
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