Acoustic Radiation of a Simplified Jet-Flap-Thrust Gate Configuration: Numerical and Experimental Investigation

A comparative study of the acoustic far-field radiation of a subsonic jet near a folded plate with an opening, intended to represent a flapped wing with thrust gate, is presented in this work. Three openings with different widths were used to evaluate experimentally the influence of the gaps in the...

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Bibliographic Details
Published in:Flow, turbulence and combustion turbulence and combustion, 2024-09, Vol.113 (3), p.601-621
Main Authors: Sirotto, José R. L. N., Cordioli, Julio A., Nogueira, Petrônio A. S., Cavalieri, André V. G., Secchi, Maicon, Wolf, William R.
Format: Article
Language:English
Subjects:
Automotive Engineering
Boundary element method
Comparative studies
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Far fields
Fluid- and Aerodynamics
Folded plates
Heat and Mass Transfer
Jet flaps
Sound sources
Sound waves
Thrust
Wave packets
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Summary:A comparative study of the acoustic far-field radiation of a subsonic jet near a folded plate with an opening, intended to represent a flapped wing with thrust gate, is presented in this work. Three openings with different widths were used to evaluate experimentally the influence of the gaps in the far-field noise radiation, for two folding angles. Boundary Element Method simulations with a wavepacket model which represents the jet acoustic source are used to calculate the far-field noise. Numerical simulation results are compared with experimental measurements and show similar trends in terms of acoustic radiation. Through parametric simulations, it was also possible to estimate that opening widths greater than one jet diameter do not contribute significantly to reducing the far-field noise. The results show that even the smallest tested openings were able to reduce the far-field noise for the tested positions.
ISSN:1386-6184
1573-1987
DOI:10.1007/s10494-023-00456-9