Accession Number : ADA116034

Title :   Turbulence Structure in the Wake of an Oscillating Airfoil.

Descriptive Note : Final technical rept. Jul 80-Sep 81,

Corporate Author : VRIJE UNIVERSITEIT BRUSSEL (BELGIUM) DEPT OF FLUID MECHANICS

Personal Author(s) : De Ruyck,J ; Hirsch,C

PDF Url : ADA116034

Report Date : Nov 1981

Pagination or Media Count : 89

Abstract : The main objective of the present study is to provide experimental information about turbulence structures in unsteady flow fields. Measurements were made in the wake of a NACA 0012 airfoil oscillating in pitch around an axis at 25% chord distance from the leading edge with a sinusoidal motion. Instantaneous profiles of velocity and all non-zero Reynolds stresses are determined at 48 phase angles within the oscillation period. Measurements were made at .7, 2, 5, 10 and 20% chord downstream of the trailing edge. Various incidences, from zero to just above stall limit, various amplitudes and frequencies were considered.

Descriptors :   *Wake, *Turbulent flow, Airfoils, Oscillation, Unsteady flow, Flow fields, Pitch(motion), Leading edges, Structures, Wind tunnel tests, Belgium

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE