Open AccessJet noise from coaxial nozzles over a wide range of geometric and flow parameters
Author(s) -
W. A. Olsen,
Robert Friedman
Publication year - 1974
Publication title -
29th aerospace sciences meeting
Language(s) - English
Resource type - Conference proceedings
DOI - 10.2514/6.1974-43
Subject(s) - coaxial , nozzle , acoustics , jet noise , jet (fluid) , noise (video) , range (aeronautics) , flow (mathematics) , mechanics , physics , materials science , computer science , electrical engineering , engineering , composite material , artificial intelligence , image (mathematics) , thermodynamics
Free field pure jet noise data were taken for a large range of coaxial nozzle configurations. The core nozzles were circular (1 to 4 in. diameter) and plug types. The fan to core area ratio varied from 0.7 to 43.5, while the velocity ratio typically varied from 0 to 1. For most cases the two nozzles were coplanar but large axial extensions of either nozzle were also tested. Correlation of the data resulted in a simple procedure for estimating ambient temperature subsonic coaxial jet noise spectra over a wide range of geometric and flow parameters.
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