Accession Number:

ADA000431

Title:

Application of the Equivalent Mechanical Flap Concept to Jet Flapped Wing-Body Combinations

Descriptive Note:

Final technical rept. May-Dec 1973

Corporate Author:

LOCKHEED-GEORGIA CO MARIETTA

Report Date:

1974-11-01

Pagination or Media Count:

154.0

Abstract:

The analysis of powered lifting systems of the jet flap type requires an accounting of the mutual aerodynamic interference between the airframe hard boundary and the jet efflux soft boundary. The development of a very generalized analysis technique is hardly feasible. However, the Externally Blown Flap EBF, Upper Surface Blowing USB, Internally Blown Flap IBF, and the Augmentor wing AW consititue a family of powered lifting systems which are reducible to a common overall aerodynamic concept, but which differ primarily in their mechanical implementation and secondarily in aerodynamic detail. This report presents a relatively simple technique based on careful application of linearized theory. The method applies to the analogous systems mentioned above. The comparison of theoretical results with experimental data shows that the method is sufficiently accurate to be very useful in practice.

Subject Categories:

  • Aerodynamics
  • Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE