Dynamics of round jet impingement

Vincent Jaunet, Matteo Mancinelli, Peter Jordan, Aaron Towne, Daniel M. Edgington-Mitchell, Guillaume Lehnasch, S. Girard

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


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.

Original languageEnglish
Title of host publication25th AIAA/CEAS Aeroacoustics Conference, 2019
PublisherAmerican Institute of Aeronautics and Astronautics
Number of pages11
ISBN (Print)9781624105883
Publication statusPublished - 2019
EventAIAA/CEAS Aeroacoustics Conference 2019 - Delft, Netherlands
Duration: 20 May 201923 May 2019
Conference number: 25th


ConferenceAIAA/CEAS Aeroacoustics Conference 2019
Internet address

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