Abstract
Results are presented of an experimental investigation into the influence on flow resistance of flow conditioning prior to the entry region of a circular sectioned tube rotating about an axis parallel to its central axis of symmetry. This investigation is part of a long term study into the effect of rotation on pressure loss and heat transfer characteristics in rotating coolant channels. It is shown that for fully developed flow, rotation has little significant effect on flow resistance in the normal laminar and turbulent zones. The transition region is, however, affected; the usual ‘dip’ in friction factor is replaced by a smoother transition from laminar to turbulent flow. For developing flow, however, it has been shown that rotation can significantly increase the flow resistance above the normal stationary correlations. This increase can be reduced by smoothing the flow with gauzes and flow straightening honeycombs prior to the entry region of the tube.
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