NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Interaction of a streamwise vortex with a turbulent mixing layerThe interaction of a single streamwise vortex with a plane turbulent mixing layer is experimentally studied. Initially, near the mixing layer origin, the vortex rides just below the layer and only affects the mixing layer properties near the bottom side of the mixing layer. Once the vortex starts to become embedded within the mixing layer and active interaction has begun, the effect of the vortex is to grossly distort the mean velocity and turbulence contours over the whole width of the mixing layer. The induced cross-flow velocities in the mixing layer result in the production of additional normal Reynolds stresses which in turn act with mean flow gradients to generate extra shear stresses. In particular, the secondary shear stress (SSS) achieves an absolute peak value equivalent to about 40 percent of the maximum primary shear stress. The position and decay of the SSS peak are then found to be strongly correlated with those of the streamwise vortex.
Document ID
19910030542
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bell, James H.
(NASA Ames Research Center Moffett Field; Stanford University, CA, United States)
Mehta, Rabindra D.
(Stanford University CA, United States)
Date Acquired
August 15, 2013
Publication Date
November 1, 1990
Publication Information
Publication: Physics of Fluids A
Volume: 2
ISSN: 0899-8213
Subject Category
Aerodynamics
Accession Number
91A15165
Funding Number(s)
CONTRACT_GRANT: NCC2-55
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available