Accession Number:

ADA289498

Title:

Unsteady Base Pressure Measurements in the Near Wake of a Cylinder with Imposed Three-Dimensional Disturbances,

Descriptive Note:

Corporate Author:

NOTRE DAME UNIV IN DEPT OF AEROSPACE AND MECHANICAL ENGINEERING

Personal Author(s):

• Borg, J. P.
• Szewczyk, A. A.

Report Date:

1995-01-01

Pagination or Media Count:

2.0

Abstract:

The effects of geometrically imposed three-dimensional disturbances that were introduced by a spanwise-periodic trailing-edge splitter plate on the instantaneous base pressure of a circular cylinder were investigated. Measurements indicate a direct coupling to the shedding frequency between the stagnation-line and base-pressure signals. A low frequency component in the base pressure power spectra was found and was directly related to the irregular shedding observed in the wake.

Descriptors:

• *VORTEX SHEDDING
• *WAKE
• *BASE PRESSURE
• REPRINTS
• EXPERIMENTAL DATA
• COMPARISON
• POWER SPECTRA
• FLOW VISUALIZATION
• THREE DIMENSIONAL
• CYLINDRICAL BODIES
• WIND TUNNEL TESTS
• UNSTEADY FLOW
• NEAR FIELD
• REYNOLDS NUMBER
• HOT WIRE ANEMOMETERS
• TRAILING EDGES
• VARIABLE PRESSURE
• STAGNATION POINT
• COMPUTATIONAL FLUID DYANMICS

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE