The results of an experimental study of hydraulic resistance of a laminar flow with air stream macrovortices in a long tube with inserted straight and twisted tapes are presented. It was found that there is a minimum in the relationship of the hydraulic resistance coefficient with the rotation pitch of the tape inserted into the tube. An empirical equation, recommended for use in a wide tape rotation pitch variation range, has been derived for calculating hydraulic resistance.
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Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, Vol. 56, No. 8, pp. 7−10, August, 2020.
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Pechenegov, Y.Y. Hydraulic Resistance of Flows in Tubes with Inserted Straight and Twisted Tapes. Chem Petrol Eng 56, 609–615 (2020). https://doi.org/10.1007/s10556-020-00817-5
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DOI: https://doi.org/10.1007/s10556-020-00817-5