Two point correlations and cross-spectra of jet noise are new tools available for jet noise diagnostics. They describe the temporal as well as the spatial coherence of the radiated sound field. Usually the coherence is limited to a relatively narrow 'beam', indicative of independent radiators. The theoretical description herein is a development of Ribner's self and shear noise formalism. Influences of source coherence, source strength distribution, and other parameters are illustrated with the aid of certain turbulent and mean flow models. Comparisons of predictions based on a 'realistic' source model with measurement show the two sets of data to be compatible. (Krautzig)
A theoretical study of the coherence of jet noise
Eine theoretische Untersuchung der Kohaerenz von Duesenlaerm
AIAA-Papers ; 1-8
1980
8 Seiten, 15 Bilder, 12 Quellen
Aufsatz (Konferenz)
Englisch
A theoretical study of the coherence of jet noise
AIAA | 1980
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