A comparison of boundary layer receptivity mechanisms
Abstract
Boundary layer receptivity mechanisms are investigated, and the implications of receptivity for the prediction of boundary layer transition are discussed. The receptivity of the Blasius boundary layer to a variety of freestream disturbances is first studied. Due to diffraction by the leading edge, oblique acoustic waves at low Mach numbers are found to produce the strongest receptivity. The case of the receptivity produced by acoustic waves interacting with porous suction surfaces in subsonic flow is then considered, and receptivity is shown to occur due to the rapid adjustment in the mean flow and to local scattering of the acoustic wave by the nonzero admittance of the porous surface.
 Publication:

AIAA, ASME, SIAM, and APS, National Fluid Dynamics Congress
 Pub Date:
 1988
 Bibcode:
 1988aiaa.conf.1273H
 Keywords:

 Blasius Equation;
 Boundary Layer Flow;
 Free Flow;
 Mach Number;
 Parallel Flow;
 Sound Waves;
 Leading Edges;
 Porous Materials;
 Subsonic Flow;
 TollmienSchlichting Waves;
 Fluid Mechanics and Heat Transfer