The purpose of this research program was to develop and assess the capabilities of numerical techniques to compute jet turbulence noise and understand the physical mechanisms governing it over a range of subsonic and supersonic nozzle exit conditions. Evaluations were made of (1) the requirements needed by time-dependent, compressible flow techniques to directly compute an accurate acoustic field and (2) the use of turbulence noise source theories to utilize the turbulent flow information to obtain the same acoustic field. Techniques were developed to extrapolate near field pressure to arbitrary far field locations and applied to time-dependent near field data supplied by the Naval Research Laboratory, NRL.
Simultaneous computation of jet turbulence and noise
Gleichzeitiges Berechnen der Turbulenz und der Laermentwicklung von Duesenflugzeugen
AIAA-Papers ; Apr ; 1-11
1988
11 Seiten, 3 Bilder, 23 Quellen
Aufsatz (Konferenz)
Englisch
Simultaneous computation of jet turbulence and noise
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