An experimental investigation of a low Reynolds number turbulent boundary layer subject to an adverse pressure gradient
Abstract
The evolution of a low Re(sub theta) turbulent boundary layer in an adverse pressure gradient (APG) is being studied for comparison with direct numerical simulations by Spalart. A short region of favorable pressure gradient (FPG) is applied first to establish a self preserving layer with Re(sub theta) equals approx. 600, which is a suitable initial condition for simulations. The APG is then applied rapidly such that beta equals approx. 2 at Re(sub theta) equals approx. 1500. The streamwise extent of the measurements exceeds the current capabilities of direct simulation so that the results should also serve as a useful data base for Reynolds averaged boundary layer prediction methods and in the future for direct simulation schemes as computer technology evolves.
 Publication:

Annual Research Briefs, 1989
 Pub Date:
 February 1990
 Bibcode:
 1990arb..nasa...37W
 Keywords:

 Flow Measurement;
 Flow Velocity;
 Low Reynolds Number;
 Pressure Gradients;
 Turbulent Boundary Layer;
 Turbulent Flow;
 Wind Tunnel Tests;
 Computational Fluid Dynamics;
 Reynolds Stress;
 Skin Friction;
 Turbulence Models;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer