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Experimental investigation on flow characteristics in circular tube inserted with rotor-assembled strand using PIV

Chinese Journal of Chemical Engineering 2019年第1期27卷 1-9页

作者： Lichen He Weimin Yang Changfeng Guan Hua Yan Lin Zheng Xiahua Zuo College of Mechanical and Electrical Engineering Beijing University of Chemical Technology

rotor-assembled strand works as a typical tube insert to achieve heat transfer augmentation and scale inhibition in a heat *** this work, the PIV experiment regarding the flow fields in a circular tube inserted with rotor-assembled strand was conducted and the flow characteristics on transverse section and longitudinal section were *** results showed that swirling flow was produced in the tube inserted with rotors and it was particularly strong within the swing diameter of the rotor on the section that contains the rotor;the average turbulence intensity and the radial velocity were improved notably; the velocity vectors on the longitudinal section remained along the direction of a straight line; both the swirling flow and average turbulence intensity were higher for the rotor with three blades than for the rotor with two blades except that the radial velocity was approximate, but they were all reduced by enlarging the lead of the *** of the flow patterns in a circular tube contributes to understanding the heat transfer efficiency and scale inhibition performance of the rotor-assembled strand and provides guidance for its application.

关键词： Particle image velocimetry (PIV) Swirling flow rotor-assembled strand Circular tube

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