Accession Number : ADA194775

Title :   Direct-Solution Techniques for Viscous Flows and Their Control.

Descriptive Note : Annual rept. 15 Oct 86-14 Oct 87,

Corporate Author : CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Ghia, Kirti N ; Ghia, Urmila

PDF Url : ADA194775

Report Date : Jan 1988

Pagination or Media Count : 40

Abstract : Two main areas of research were pursued. In the area of active control of separated flows, the oscillating flap mechanism is examined by considering a backstep channel with an oscillating flap located in the primary reattachment region. A procedure has been developed for generating clustered conformal coordinates for this geometry with arbitrary orientations of the flap. Considerable effort was directed towards making the computational procedure efficient, so as to make it useful for repeated application needed for this temporally deforming geometry. The corresponding flow solution is presently being developed. Flow past an elliptic cylinder is studied with the objective of examining flow control via an unsteady free stream.

Descriptors :   *VISCOUS FLOW, *VORTICES, *UNSTEADY FLOW, CLUSTERING, COMPUTATIONS, CONFORMAL STRUCTURES, CONTROL, COORDINATES, CYLINDRICAL BODIES, DEFORMATION, ELLIPSES, FLAPS(CONTROL SURFACES), FLOW, FLOW SEPARATION, GEOMETRY, ORIENTATION(DIRECTION), OSCILLATION, SOLUTIONS(GENERAL), VELOCITY, CONFORMAL MAPPING, THREE DIMENSIONAL FLOW, ATTACHMENT, DATA BASES, DATA MANAGEMENT, INPUT OUTPUT PROCESSING

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE