Accession Number:

ADA242882

Title:

F/A-18 1/9th Scale Model Tail Buffet Measurements

Descriptive Note:

Corporate Author:

AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)

Report Date:

1991-06-01

Pagination or Media Count:

35.0

Abstract:

Wind-tunnel tests have been carried out on a 19th scale model of the FA-18 at high angles of attack to investigate the characteristics of tail buffet due to bursting of the wing leading edge extension LEX vortices. The tests were carried out at the Aeronautical Research Laboratory low speed wind- tunnel facility and form part of a collaborative activity with NASA Ames Research Center, organised by The Technical Cooperative Programme TTCP. Information from the programme will be used in the planning of similar collaborative tests, to be carried out at NASA Ames, on a full scale aircraft. The programme covered the measurement of unsteady pressures and fin vibration for cases with and without the wing LEX fences, designed by McDonnell Aircraft Company, fitted. Fourier transform methods have been used to analyse the unsteady data, and information on the spatial and temporal content of the vortex burst pressure field has been obtained. Flow visualization of the vortex behaviour was carried out using smoke and a laser light sheet technique.

Subject Categories:

  • Aerodynamics
  • Attack and Fighter Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE