Accession Number : ADA260410


Title :   Control of Two- and Three-Dimensional Wake Instabilities from Bluff-Bodies


Descriptive Note : Project abstract rept. 1 Oct 1991-30 Sep 1992


Corporate Author : LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS


Personal Author(s) : Rockwell, Donald


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260410.pdf


Report Date : Dec 1992


Pagination or Media Count : 8


Abstract : The long-range goals of this investigation are to: (1) Determine the effects of various active and passive control techniques on the instantaneous and time-averaged structure of the three-dimensional wake of a cylinder at low and high Reynolds number; (2) Characterize the unsteady loading on the cylinder, including the phase shifts between the cylinder motion, the forces acting on the cylinder, and the three-dimensional structure of the near-wake; and (3) Develop new types of experimental techniques, focusing on high-image-density particle image velocimetry (PIV), image processing and pattern recognition, and methods of instantaneous force measurement.


Descriptors :   *CYLINDRICAL BODIES , *WAKE , VELOCITY , IMAGE PROCESSING , PATTERN RECOGNITION , UNSTEADY FLOW , STREAMFLOW ANALYSIS , REYNOLDS NUMBER , TRANSDUCERS , TWO DIMENSIONAL , VORTICES , THREE DIMENSIONAL


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE