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OverviewThe initial structure and axial decay of an array of streamwise vortices embedded in a turbulent pipe boundary layer is experimentally investigated. The vortices are shed in counter-rotating fashion from an array of equally-spaced symmetric airfoil vortex generators. Vortex structure is quantified in terms of crossplane circulation and peak streamwise vorticity. Flow conditions are subsonic and incompressible. The focus of this study is on the effect of the initial spacing between the parent vortex generators. Arrays with vortex generators spaced at 15 and 30 degrees apart are considered. When the spacing between vortex generators is decreased the circulation and peak vorticity of the shed vortices increases. Analysis indicates this strengthening results from regions of fluid acceleration in the vicinity of the vortex generator array. Decreased spacing between the constituent vortices also produces increased rates of circulation and peak vorticity decay. Wendt, B. J. and Reichert, B. A. Glenn Research Center NASA-CR-198544, NAS 1.26:198544, E-10512 NAS3-27377; RTOP 523-36-13... Full Product DetailsAuthor: National Aeronautics and Space Adm NasaPublisher: Independently Published Imprint: Independently Published Dimensions: Width: 21.60cm , Height: 0.20cm , Length: 27.90cm Weight: 0.095kg ISBN: 9781792839726ISBN 10: 1792839723 Pages: 30 Publication Date: 04 January 2019 Audience: General/trade , General Format: Paperback Publisher's Status: Active Availability: In stock  We have confirmation that this item is in stock with the supplier. It will be ordered in for you and dispatched immediately. Table of ContentsReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |
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