Accession Number : AD0775885

Title :   Turbulence Induced Changes in Vortex Shedding from a Circular Cylinder.

Descriptive Note : Technical rept.,

Corporate Author : COLORADO STATE UNIV FORT COLLINS FLUID MECHANICS PROGRAM

Personal Author(s) : Barnett,Kenneth M. ; Cermak,J. E.

Report Date : JAN 1974

Pagination or Media Count : 136

Abstract : Turbulence effects on vortex shedding from a circular cylinder were investigated in a wind tunnel. Turbulence intensity, near the center of a wind tunnel, was increased by plates of similar geometry with many small holes with blockage ratios from .50 to .97. The Re of all flows was kept near 40,000. Vortex shedding frequency was observed simultaneously by a pressure transducer and a hot wire anemometer. Flow visualization, spectra and transducer output voltages with different wake anples were utilized to estimate transition and separation. Six things were observed that have not been published, to the best of the author's knowledge. (Modified author abstract)

Descriptors :   *Vortex shedding, *Turbulent flow, *Cylindrical bodies, Test methods, Wind tunnel models, Flow visualization, Flow separation, Transducers, Hot wire, Anemometers, Mathematical models

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE