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].
Titolo: | Dynamics of round jet impingement | |
Autori: | ||
Data di pubblicazione: | 2019 | |
Citazione: | 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]. | |
Handle: | http://hdl.handle.net/11590/404803 | |
ISBN: | 978-1-62410-588-3 | |
Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |