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 Kelvin-Helmholtz 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.

Jaunet, V., Mancinelli, M., Jordan, P., Towne, A., Edgington-Mitchell, D.M., Lehnasch, G., et al. (2019). Dynamics of round jet impingement. In 25th AIAA/CEAS Aeroacoustics Conference, 2019. American Institute of Aeronautics and Astronautics Inc, AIAA [10.2514/6.2019-2769].

Dynamics of round jet impingement

Mancinelli M.;
2019-01-01

Abstract

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 Kelvin-Helmholtz 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.
978-1-62410-588-3
Jaunet, V., Mancinelli, M., Jordan, P., Towne, A., Edgington-Mitchell, D.M., Lehnasch, G., et al. (2019). Dynamics of round jet impingement. In 25th AIAA/CEAS Aeroacoustics Conference, 2019. American Institute of Aeronautics and Astronautics Inc, AIAA [10.2514/6.2019-2769].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/404803
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