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Effects of an Upstream Circular Manipulator on the Flow Past a Cylinder-Flat Plate Junction

[+] Author Affiliations
Alan Dow, George Elizarraras, Hamid R. Rahai, Hamid Hefazi

California State University at Long Beach, Long Beach, CA

Paper No. FEDSM2003-45456, pp. 1503-1508; 6 pages
doi:10.1115/FEDSM2003-45456
From:
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 2: Symposia, Parts A, B, and C
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3697-5 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME

abstract

Measurements of three components of mean velocity and simultaneous time-resolved measurements of axial and vertical turbulent velocities and their cross moment were made at three perpendicular planes slightly upstream of the corner and in the downstream interaction region of a cylinder-flat plate junction with and without an upstream circular manipulator. The circular manipulator was a smooth circular cylinder of 1.25 mm diameter, which was placed upstream of the cylinder at X/D = 1.2, within the boundary layer above the flat plate surface. Results show that when the manipulator is in place, there is a decrease in the axial mean velocity and increases in the axial mean squared turbulent velocity and turbulent shear stress at the first plane. There is an expanded region of secondary flow with reduced circulation, indicating that the manipulator has reduced the strength of the horseshoe vortex in this region.

Copyright © 2003 by ASME

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