22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-3.2.1

PREDICTION OF SEPARATION INDUCED BUFFET OVER NOVEL WING CONFIGURATIONS

M. I. Woods (1), N. J. Wood (2)
(1) University of Bath, UK; (2) University of Manchester, UK

Keywords: subsonic, high angle of attack, buffet, vortex, separation

The compromise between aerodynamics and stealth technology has resulted in the generation of wing planforms which are both novel in relation to existing aircraft and unfamiliar to aerodynamicists concerned with the prediction of steady and unsteady aerodynamic loads. It is necessary to be able to predict these loads such that they can be minimised during the early design stage of an aircraft, and then adequately accounted for from both strength and fatigue viewpoints during the detailed design process. This paper presents the buffet experienced by a lambda wing model, and details an initial step toward a prediction methodology for use as a design tool. The RMS buffet and the spectral content of the pressure fluctuations can be estimated from a mean pressure distribution, whether derived experimentally or using computational techniques.

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