Accession Number:

ADA179582

Title:

The Structure of Turbulent Velocity Fields.

Descriptive Note:

Final rept. 1 Feb 84-31 Jan 85,

Corporate Author:

ARIZONA UNIV TUCSON ENGINEERING EXPERIMENT STATION

Personal Author(s):

Report Date:

1986-01-24

Pagination or Media Count:

24.0

Abstract:

Sinusoidal disturbances, symmetrically distributed about the centerline of a turbulent wake, were introduced near the trailing edge of a flat plate to generate the varicose mode of instability. Phase averaged measurements of the u component of velocity fluctuations were decomposed into the two modes, and the results were compared with the appropriate theoretical eigenfunctions. The later distribution of the amplitude and phase of each mode agree reasonably well with their theoretical counterparts. The amplitude ratio of the two modes appear to approach an asymptotic value in the far wake. Keywords Turbulence Wakes Coherent structures Modes.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE