Oscillatory pressure measurements on a flexible slender-wing model at low subsonic speeds

Abstract

Summary Oscillatory pressure measurements have been made on a flexible slender-wing model in a low subsonic speed wind tunnel. The model was vibrated at 5 Hz in a single longitudinal bending mode, and measurements were taken at wind speeds of 140, 180 and 220 ft/s (43, 55 and 67 m/s) from 24 pressure transducers installed in one half of the model. Corresponding values of oscillatory pressures were calculated for comparison with those measured. It is shown that over the broad area of the wing there is good agreement between theory and experiment within the range of frequency parameters investigated. Near the apex of the wing shortcomings inherent in the theory may account for the discrepancies observed between theory and experiment.