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Accession Number:
AD0294703
Title:
SPECULATIVE CONSIDERATION ON HIGH-FREQUENCY INSTABILITY OF THE LAMINAR BOUNDARY LAYER AND ITS EFFECT ON THE DESIGN OF STABILIZING COATINGS
Corporate Author:
RAND CORP SANTA MONICA CA
Report Date:
1962-12-01
Abstract:
Recent theoretical work indicates the possibility of a high-frequency instability of the laminar boundary layer. Recent experimental findings provide evidence for the existence of a high-frequency instability of the laminar boundary layer. The critical frequency of the experimentally indicated high-frequency instability is approximately 40 of the freestream velocity divided by the laminar-boundarylayer thickness or about 25 times the most critical frequency of the Tollmien-Schlichting waves. The wave length of the high-frequency instability is about 1.9 times the laminarboundary-layer thickness or approximately 18 the wave length of the most critical TollmienSchlichting waves. The eddies resulting from the high-frequency instability are spaced much closer to the surface than to each other, which makes the damping of the high-frequency instability of the laminar boundary layer by an appropriate stabilizing coating a promising possibility. Author
Pages:
0018
Distribution Statement:
Approved fpr public release; distribution unlimited
Contract Number:
AF 49(638)-700
File Size:
0.51MB
