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A computational study of the topology of vortex breakdownA fully three-dimensional numerical simulation of vortex breakdown using the unsteady, incompressible Navier-Stokes equations has been performed. Solutions to four distinct types of breakdown are identified and compared with experimental results. The computed solutions include weak helical, double helix, spiral, and bubble-type breakdowns. The topological structure of the various breakdowns as well as their interrelationship are studied. The data reveal that the asymmetric modes of breakdown may be subject to additional breakdowns as the vortex core evolves in the streamwise direction. The solutions also show that the freestream axial velocity distribution has a significant effect on the position and type of vortex breakdown.
Document ID
19920032253
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Spall, Robert E.
(High Technology Corp. Hampton, VA, United States)
Gatski, Thomas B.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
November 8, 1991
Publication Information
Publication: Proceedings, Series A - Mathematical and Physical Sciences
Volume: 435
Issue: 1894
ISSN: 0080-4630
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
92A14877
Funding Number(s)
CONTRACT_GRANT: NAS1-18240
Distribution Limits
Public
Copyright
Other

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