Accession Number:

ADA110291

Title:

Problems in Forced Unsteady Fluid Mechanics.

Descriptive Note:

Final technical rept. 1 Nov 77-31 Oct 80,

Corporate Author:

WRIGHT STATE UNIV DAYTON OHIO

Personal Author(s):

• Viets,Hermann
• Piatt,Michael
• Ball,Mont
• Bethke,Richard J.
• Bougine,David

Report Date:

1981-11-01

Pagination or Media Count:

245.0

Abstract:

Forced unsteady fluid flows are examined from the point of view of positive implications of the time dependency. Particular problems examined in a forced unsteady mode are jets, wind tunnels, wings, ramps and diffusers, dump combustors and vortex structure. Two methods of forcing the flow are studied in detail, fluidic feedback and a cam-shaped rotor. The fluidic method produces an unsteady jet while the rotor acts as a time dependent vortex generator. Potential performance improvements with unsteady flow are evident in all of the flows examined. Author

Descriptors:

• *UNSTEADY FLOW
• TIME DEPENDENCE
• VORTICES
• AIRFOILS
• FLOW FIELDS
• WINGS
• JET FLOW
• VORTEX GENERATORS
• DIFFUSERS

Subject Categories:

• Aircraft
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE