Accession Number:

ADA038908

Title:

'E-9': Stability Theory and Boundary-Layer Transition

Descriptive Note:

Interim rept.

Corporate Author:

RAND CORP SANTA MONICA CA

Personal Author(s):

Report Date:

1977-02-01

Pagination or Media Count:

41.0

Abstract:

Successful low-drag design employs methods of boundary-layer control to delay the transition of unstable laminar boundary layers, but a suitable comprehensive theory is needed to guide prediction and control of boundary-layer transition for low-drag hydrodynamics. This report suggests new and less formal nonlinear theories, which combine the growth rates and frequency dependence of the two-dimensional Tollmien-Schlichting waves which are the basis of the e-9 method and the three-dimensional nonlinear processes of modern stability theory. These could ultimately lead to improvements in the understanding and manipulation of the transition process in low-drag hydrodynamics, and to the inclusion of disturbance effects.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE