Accession Number:

ADA127043

Title:

Aerodynamics of Airfoils Subject to Three-Dimensional Periodic Gusts.

Descriptive Note:

Final rept. 1 Jan 81-31 Jul 82,

Corporate Author:

NOTRE DAME UNIV IN DEPT OF AEROSPACE AND MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1982-07-01

Pagination or Media Count:

68.0

Abstract:

This report outlines our research activities for the period of the AFOSR grant. It is not intended to give a detailed description of our work. Such details are described in our publications and cited references. The report, however, defines the scope of our research on the unsteady aerodynamics and the stability analysis of turbomachine components and its relevance to ongoing technological developments in turbomachine design. The mean topic of our research is the unsteady aerodynamics of lifting airfoils subject to three-dimensional gusts. However, the mathematical methods we have developed for this purpose, evolved into a general theory for unsteady vortical and entropic distortions of potential flows. This theory can be also applied within the approximation of the rapid distortion theory of turbulence to study the change in turbulence characteristics near the stagnation point of a bluff body. The mathematical theory was applied to study the aerodynamics of lifting airfoils subject to three-dimensional gusts. For low Mach numbers, an integral equation was derived and a numerical scheme was developed for its solution. All previous gust analyses correspond to particular cases of our present work. We have therefore compared our results with previous linear and nonlinear theories.

Subject Categories:

  • Aerodynamics
  • Aircraft
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE