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Generation of circumferential velocity contours associated with pulsed point suction on a rotating diskNumerous experimental studies were conducted on the steady, three-dimensional boundary layer over a disk rotating at constant angular speed in an otherwise undisturbed fluid. The subject flow geometry is of interest because it provides a relatively simple way to study the cross-flow instability phenomenon which occurs in three-dimensional boundary layers, as on swept wings. This flow instability results in the formation of a stationary spiral vortex flow field over the disk, as shown by Wilkinson and Malik. Using a hot-wire probe, the spatial wave pattern of stationary vortices, which filled the entire circumference of the disk was mapped. The subject flow instability caused transition-to-turbulent flow as the periphery of the disk was approached. The effect on receptivity and transition of discrete disturbance modes, such as three-dimensional toughness elements and acoustic excitation was investigated. The present study (an extension of the work of Wilkinson and Malik) is focused on the effect of pulsed point suction on flow instability and transition, and consequently, on the classical stationary vortical flow pattern.
Document ID
19900015749
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Selby, Gregory V. (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1989
Publication Information
Publication: NASA/American Society for Engineering Education (ASEE) Summer Faculty Fellowship Program 1989
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
90N25065
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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