Accession Number : ADA195559

Title :   A Study of the Effect of Random Input Motion on Low Reynolds Number Flows.

Descriptive Note : Final rept. Sep 85-Nov 87,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s) : Unruh, James F. ; Park, Joel T. ; Johnson, James E.

Report Date : MAY 1988

Pagination or Media Count : 64

Abstract : The SwRI large water tunnel was modified by the addition of a large test section (.71 m x .81 m x 1.8 m long) to provide low Reynolds number flows with low blockage for models in a highly separated flow condition. Flow characteristics are documented and other physical features are described. The feasibility of conducting water tunnel experiments involving unsteady aero-hydrodynamics was demonstrated by performing a series of flow visualization studies on a oscillating airfoil (NACA 0012). This experiment was carried out at a reduced fully separated until 17 degress angle of attack, and the downstream wash of the separated flow occurred at 22 degrees. (mjm)

Descriptors :   *FLOW, *REYNOLDS NUMBER, *WATER TUNNELS, AIRFOILS, ANGLE OF ATTACK, FLOW SEPARATION, FLOW VISUALIZATION, INPUT, LOW RATE, MOTION, OSCILLATION, TEST EQUIPMENT.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE