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http://dx.doi.org/10.3795/KSME-B.2003.27.2.206

Measurement of Developing Turbulent Flows in a 90-Degree Square Bend with Spanwise Rotation  

Kim, Dong-Chul (고려대학교 대학원 기계공학과)
Choi, Young-Don (고려대학교 기계공학과)
Lee, Kun-Hee (원광대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.2, 2003 , pp. 206-214 More about this Journal
Abstract
Mean flow and turbulence properties of developing turbulent flows in a 90 degree square bend with spanwise rotation were measured by a hot-wire anemometer. A slanted wire is rotated into 6 orientations and the voltage outputs from them are combined to obtain the mean velocity and Reynolds stress components. The combinative effects of the centrifugal and Coriolis forces due to the curvature and the rotation of bend on the mean motion and turbulence structures are investigated experimentally. Results show that the two body forces can either enhance or counteract each other depending on the flow direction in the bend.
Keywords
Coriolis Force; 90 Degree Bend; Turbulent Flow; Rotation Number;
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