TURBULENT BOUNDARY LAYER ON A FINELY PERFORATED SURFACE UNDER CONDITIONS OF AIR INJECTION AT THE EXPENSE OF EXTERNAL FLOW RESOURCES

The characteristics of an incompressible turbulent boundary layer on a fl at plate with air blown in though a fi nely perforated surface from an external confi ned fl ow through an input device, located on the "idle" side of the plate, have been investigated experimentally and numerically. A stable decrease in the local values of the coeffi cient of surface friction along the plate length that attains 85% at the end of the perforated portion is shown. The experimental and calculated data obtained point to the possibility of modeling, under earth conditions, the process of controlling a turbulent boundary layer with air injection by using the resources of an external confi ned fl ow.
   
Author:  V. I. Kornilov, A. V. Boiko, and I. N. Kavun
Keywords:  turbulent boundary layer, flat plate, finely perforated surface, blowing-in (injection), input device, friction
Page:  1500