Accession Number : ADA317667
Title : Dynamical Effects of Delta Wing Actuators on Streamwise Vortices in Boundary Layers.
Descriptive Note : Final rept. 1 Nov 94-30 Jun 96,
Corporate Author : CALIFORNIA UNIV LOS ANGELES
Personal Author(s) : Blackwelder, Ron F.
PDF Url : ADA317667
Report Date : 07 NOV 1996
Pagination or Media Count : 3
Abstract : Small delta wing actuators have been constructed and employed in a turbulent boundary layer to provide a disturbance in the wall region. The actuators oscillate perpendicular to the wall with small amplitudes of a few viscous scales. The oscillations set up a spanwise flow of low speed fluid near the wall that coagulates into low speed regions. Since other investigators have found that a spanwise flow near the wall can reduce the drag on the bounding surface, these actuators may be a convenient method to introduce such a spanwise velocity in the near wall region.
Descriptors : *TURBULENCE, *TURBULENT BOUNDARY LAYER, VORTICES, WIND TUNNEL TESTS, ACTUATORS, FREE STREAM, DELTA WINGS.
Subject Categories : Aerodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE