Influence of Flow Twisting on Convective Heat Transfer in Banks of Twisted Tubes

The method of artificial turbulization of flow by twisting the latter by twisted tubes allows one to substantially reduce the overall dimensions and mass of heat exchanging apparatuses owing to heat transfer enhancement due to the deformation of the velocity and temperature profiles in the wall layer on twisted tubes and due to the increase in the intensity of heat and mass transfer processes between the wall layer and the flow core in longitudinal flow past banks of twisted tubes. The results of experimental investigations of heat transfer and hydraulic resistance that were obtained by the present author and other research workers for banks of twisted tubes and rods with spiral finning, where the flow structure is close to that in the banks of twisted tubes, are correlated and analyzed.