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Low Reynolds number separation bubble research at UTRCThe facilities and techniques being applied in investigations of laminar separation bubbles on low Re airfoils at the United Technologies Research Center are described. The research is focused on developing a database and predictive models for use in designing compressor, fan and turbine blades. Flow data are gathered primarily by laser Doppler velocimetry. Experimental procedures are being devised which will permit formation of a short bubble for characterizations of the velocity profiles in and around the bubble and boundary layer. Further tests are directed at defining the size and location of the bubble and the transition in the separated shear layer. The sensitivity of the bubble to alterations in the Re, pressure gradient, turbulence intensity and the turbulence scales will be examined. The effects of surface curvature and roughness on the bubble will also be studied. Details of the wind tunnel facility and the steps being taken to define conditions for reliably producing the short bubble are outlined.
Document ID
19860031573
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Patrick, W. P.
(United Technologies Research Center East Hartford, CT, United States)
Edwards, D. E.
(United Technologies Research Center East Hartford, CT, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
86A16311
Funding Number(s)
CONTRACT_GRANT: NAS3-23693
Distribution Limits
Public
Copyright
Other

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