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Experimental parametric study of jet vortex generators for flow separation controlA parametric wind-tunnel study was performed with jet vortex generators to determine their effectiveness in controlling flow separation associated with low-speed turbulence flow over a two-dimensional rearward-facing ramp. Results indicate that flow-separation control can be accomplished, with the level of control achieved being a function of jet speed, jet orientation (with respect to the free-stream direction), and orifice pattern (double row of jets vs. single row). Compared to slot blowing, jet vortex generators can provide an equivalent level of flow control over a larger spanwise region (for constant jet flow area and speed). Dye flow visualization tests in a water tunnel indicated that the most effective jet vortex generator configurations produced streamwise co-rotating vortices.
Document ID
19910006983
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Selby, Gregory (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-CR-187836
NAS 1.26:187836
Accession Number
91N16296
Funding Number(s)
CONTRACT_GRANT: NAG1-1071
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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