Wind-tunnel tests have been carried out on a 1/9th scale model of the F/A-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, organized by The Technical Cooperative Program (TTCP). Information from the program will be used in the planning of similar collaborative tests, to be carried out at NASA Ames, on a full scale aircraft. The program 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 analyze 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 behavior was carried out using smoke and a laser light sheet technique.
F/A-18 1/9th Scale Model Tail Buffet Measurements Fatigue
1991
34 pages
Report
Keine Angabe
Englisch
Aerodynamics , Aircraft , Buffeting , Tail assemblies , Aircraft industry , Behavior , Fins , Flow visualization , Fourier transformation , High angles , Laser beams , Leading edges , Methodology , Pressure , Pressure measurement , Research facilities , Rupture , Sheets , Smoke , Variable pressure , Vibration , Vortices , Wind tunnel tests , Wings , Foreign technology , Jet fighters , F/A-18 Aircraft , High angle of attack.
F/A-18 1/9th scale model tail buffet measurements
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