Study of threedimensional pressuredriven turbulent boundary layer
Abstract
A three dimensional, pressure driven turbulent boundary layer created by an idealized wingbody junction flow is experimentally studied. The body used is a 3:2 elliptical nosed NACA 0020 tailed symmetric profile which has a chord length of 30.5 cm (12 in.), maximum thickness of 7.17 cm (2.824 in.), height of 22.9 cm (9.016 in.). The body was sitting on a flat plate. The nominal reference velocity of the flow is 27 m/sec and the Reynolds number based on the momentum thickness at 0.75 chord upstream of the body on the centerline of the tunnel is approximately 5936. The data presented include timemean static pressure, skin friction magnitude and direction on the wall, as well as the mean velocity and all Reynolds stresses at several stations on a line determined with the mean velocity vector component parallel to th wall in the layer where the normal stress is maximum. The mean velocity and stress data were obtained both with hotwire (HW) and laserDopplervelocimeter (LDV) techniques. The LDV measurement were taken twice due to the differences observed between the HW and LDV data, which is also shown with the present study. This gave a chance to study the uncertainties on the mean velocity and the stresses extensively. Pressure distributions on the wing and the on on the bottom plate were obtained with a Scanivalve and an inclined manometer.
 Publication:

Technical Report
 Pub Date:
 August 1990
 Bibcode:
 1990vpi..rept.....O
 Keywords:

 BodyWing Configurations;
 Flow Measurement;
 Flow Velocity;
 Laser Doppler Velocimeters;
 Skin Friction;
 Three Dimensional Boundary Layer;
 Turbulent Boundary Layer;
 Flat Plates;
 Manometers;
 Momentum Transfer;
 Pressure Distribution;
 Reynolds Stress;
 Static Pressure;
 Upstream;
 Wall Flow;
 Fluid Mechanics and Heat Transfer