Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Measurement of Developing Turbulent Flows in a 90-Degree Square Bend with Spanwise Rotation

  • Choi Young Don (Department of Mechanical Engineering, Korea University) ;
  • Kim Dong Chul (Graduate School, Department of Mechanical Engineering, Korea University) ;
  • Lee Kun Hee (Department of Mechanical Engineering, Wonkwang University)
  • Published : 2005.07.01
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Abstract

Mean flow and turbulence properties of developing turbulent flows in a 90 degree square bend with span-wise rotation are 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 the Reynolds stress components. Combined effects of the centrifugal and Coriolis forces due to the curvature and the rotation of the 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

References

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