This paper presents a potential flow model of two-dimensional cavity flow in which the shear layer is represented by discrete rectilinear vortices. The model compares favorably with physical features of real cavity flows. A theory is developed through which the noise generation by the cavity may be evaluated. Calculations of the spectra and directivity of the quadrupole noise source determined by this theory explain frequency and directivity phenomena observed in airframe noise testing of real aircraft.
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Hardin et al. (1977) studied this question.
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