Effect of Streamwise Vortices on Tollmien-Schlichting Waves,

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Abstract:

The method of multiple scales is used to determine a first-order uniform expansion for the effect of counter-rotating steady streamwise vortices in growing boundary layers on Tollmien-Schlichting waves. The results show that such vortices have a strong tendency to amplify three-dimensional Tollmien-Schlichting waves having a spanwise wavelength that is twice the wavelength of the vortices. An analytical expression is derived for the growth rates of these waves. These growth rates increase linearly with increasing amplitudes of the vortices. Author

Author(s):
Nayfeh, Ali Hasan
Author Organization(s):
VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIENCE AND MECHANICS
Pagination:
0020

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
VPI-E-79-12
Contract/Grant Number(s):
N00014-75-C-0381, NASA-NSG-1255
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_1.2.3_Educating; JCA_5.3_Planning
Modernization Areas:
Fully Networked C3
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*BOUNDARY LAYER, *VORTICES, *COUNTERROTATION, GROWTH(GENERAL), FLOW VISUALIZATION, WAVE PROPAGATION, BUBBLES, WIND TUNNEL TESTS, PHOTOGRAPHIC ANALYSIS, PERTURBATIONS, NAVIER STOKES EQUATIONS, FREE STREAM, WAVE EQUATIONS
Field(s)/Group(s):
Fluid Mechanics
Keyword(s):
Tollmien Schlichting waves, WUNR061201
Report Date:
1979 Mar 01