Experiment on turbulent boundary layers on a concave wall
Abstract
The present experiment describes the behavior of a turbulent boundary layer on a concave wall. At the onset of curvature there appears a fairly coherent wavelike transverse profile of mean velocity. This disturbance might be interpreted as a kind of large scale TaylorGoertler type instability superimposed on a conventional turbulent boundary layer; further downstream the coherence degenerates as the turbulence level increases. Boundarylayer profile measurements were made at positions of maxima and minima of transverse profiles of (Ucomponent) mean velocity. The boundary layer at the minima positions is found to be twice as thick as that at the maxima positions. Also, turbulent intensities inside the boundary layer are substantially increased as a result of the concave curvature of the surface.
 Publication:

Aeronautical Quarterly
 Pub Date:
 February 1975
 Bibcode:
 1975AeQ....26...25S
 Keywords:

 Boundary Layer Stability;
 Concavity;
 Taylor Instability;
 Turbulent Boundary Layer;
 Wall Flow;
 Flow Measurement;
 Surface Geometry;
 Velocity Distribution;
 Vortices;
 Fluid Mechanics and Heat Transfer