Dynamics of round jet impingement | Zendy

Vincent Jaunet | Zendy; Matteo Mancinelli | Zendy; Peter Jordan | Zendy; Aaron Towne | Zendy; Daniel Edgington-Mitchell | Zendy; Guillaume Lehnasch | Zendy; Stève Girard | Zendy

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Dynamics of round jet impingement

Author(s) -

Vincent Jaunet,

Matteo Mancinelli,

Peter Jordan,

Aaron Towne,

Daniel Edgington-Mitchell,

Guillaume Lehnasch,

Stève Girard

Publication year - 2019

Publication title -

28th aiaa/ceas aeroacoustics 2022 conference

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.2019-2769

Subject(s) - jet (fluid) , mechanics , dynamics (music) , aerospace engineering , physics , computer science , acoustics , engineering

The impingement of a round jet issued from a convergent nozzle is known to produce intense tonal noise. These tones are generated by a feedback process involving a KelvinHelmholtz instability wave and an upstream-travelling guided jet mode. The frequency structure of these tones is experimentally explored by varying the jet Mach number from 0.7 to 1.5 and we observe evidence that the upstream-travelling guided modes of the jet are active in the feedback process. Tone frequency predictions obtained using the intrinsic jet modes are compared to the standard model involving free-stream acoustic waves: the upstream-travelling guided waves model provides a convincing agreement with the experimental data.this make

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