Measurements of spoiler aerodynamic noise, generated in a low velocity flow duct and radiated from an open exhaust termination, have been made in the form of sound power spectra. The individual 1/3 octave power measurements are satisfactorily collapsed with the aid of derived theoretical scaling laws. Non-dimensional spectra are presented which permit generalized predictions of flow noise for bluff bodies, including splitter attenuators, mounted in low speed flow ducts.
Aerodynamic sound production in low speed flow ducts
Year:
1981
Bibliographic info:
Journal of Sound and Vibration (1981) , n° 79 (2), pp 263-289