AN EXPERIMENTAL STUDY OF ACOUSTIC EXCITATION OF FLAT PLATES BY UNSTEADY FLOW
TAGGART (ROBERT) INC FAIRFAX VA
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Tests were conducted in a gravity flow tunnel with a thin, flexible plate installed in one wall. Measurements were made of flow velocities and boundary layer characteristics in the tunnel and correlated with acoustic measurements of the test plate vibrations. It is demonstrated that unsteady flow excitation at the boundary causes vibration of the plate at many natural modes. Data on vibration amplitudes are related to the excitation of pressure fluctuations in the boundary layer.