Evaluation of transonic buffeting onset boundary estimated by trailing edge pressure divergence and RMS data of wing vibration

Resumo

© 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018. All rights reserved.An evaluation of the transonic buffeting onset boundary estimated by trailing edge pressure and RMS(root mean square) data of wing root strain is presented. The analysis is based on wind tunnel data of two modern transonic aircraft. The results obtained with the pressure and wing vibration data are compared to a steady aerodynamics coefficient methodology that was evaluated with flight test results. The evaluation concludes that strain gauge data provides a mean of quantifying the buffeting onset magnitude that can be correlated to flight test results. The trailing edge pressure data divergence criterion underestimates the buffeting onset boundary, but the magnitude of the pressure divergence can be adjusted for better results.

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