Abstract
The simple pressure source model of the sound radiated by a cold, subsonic jet is investigated analytically and experimentally. From the simple source model, the ratio of the frequency spectra of the radiated sound power and the jet pressure is derived for an assumed form of the jet pressure cross correlation. Measurements of the spatial distribution of the over-all jet pressure levels, the frequency spectra of the jet pressure fluctuations, the axial and radial separation cross correlations of the jet pressures, and the cross correlation between jet pressure and farfield sound pressure are presented. Some implications of the simple source model with regard to noise suppression are also discussed.
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