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  • 1
    Publication Date: 2019-07-13
    Description: An experimental study is conducted to examine the crossplane structure and streamwise decay of vortices shed from airfoil-type vortex generators. The vortex generators are set in a counter-rotating array spanning the full circumference of a straight pipe. The span of the vortex generators above the duct surface, h, is approximately equal to the local turbulent boundary layer thickness, delta. Measurement of three-component mean flow velocity in downstream crossplanes are used to characterize the structure of the shed vortices. Measurements in adjacent crossplanes (closely spaced along the streamwise coordinate) characterize the interaction and decay of the embedded vortices. A model constructed by the superposition of Oseen vortices is compared to the data for one test case.
    Keywords: AERODYNAMICS
    Type: NASA-CR-198356 , E-9730 , NAS 1.26:198356 , AIAA PAPER 95-1797 , Applied Aerodynamics Conference; 19-22 Jun. 1995; San Diego, CA; United States
    Format: application/pdf
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