Abstract
The results of an experimental study of the effects of different nozzle heads on turbulent jet noise are analyzed. A configuration of four cylindrical heads, tabbed heads, and “chevron” nozzles are considered and the decreases in the acoustic-mechanical efficiency of the jet (acoustic power reduction) for jets exposed to different modes of action are compared.
It is shown that the effects of tabbed and cylindrical heads, as well as of chevrons, share a common property which is associated with the occurrence of vorticity in the jet source and can be described on the basis of a unified criterion characterizing the action on both the jet flow structure and the jet noise.
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Krasheninnikov, S.Y., Mironov, A.K. Effect of the Streamwise Component of the Vorticity Formed in a Turbulent Jet Source on the Acoustic Characteristics of the Jet. Fluid Dynamics 38, 698–711 (2003). https://doi.org/10.1023/B:FLUI.0000007832.26819.97
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DOI: https://doi.org/10.1023/B:FLUI.0000007832.26819.97