Noise Amplification Effects due to Jet-Surface Interaction

Leandro Falcão Loureiro Rêgo, Francesco Avallone, Daniele Ragni, Damiano Casalino

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

6 Citations (Scopus)
204 Downloads (Pure)


A numerical investigation on jet-installation noise is performed using a software based on the Lattice-Boltzmann Method. A flat plate is placed in the irrotational hydrodynamic field of the jet, i.e. outside of the plume, resulting in noise increase due to the scattering of instability waves at the plate trailing edge. The configuration adopted in this work replicates the one used for a benchmark study at NASA Glenn, against which the numerical results are validated. Far-field noise spectra from the isolated and installed jet cases, obtained through the Ffowcs-Williams Hawkings analogy, are compared at different polar angles. The results show a low-frequency noise amplification, occurring mainly in the directions normal to the plate and upstream of the jet axis. It is also shown that strong pressure fluctuations are generated at the trailing-edge of the plate and then propagate to the far-field as acoustic waves. The effects of the plate geometry (length and radial position) and jet flow characteristics (velocity and temperature) on the installation noise are also addressed. Pressure fluctuations on the plate are also computed and correlated to the overall far-field results, showing that, in the installed case, the surface dipoles are the dominant sources at low frequencies
Original languageEnglish
Title of host publicationAIAA Scitech 2019 Forum
Subtitle of host publication7-11 January, San Diego, United States
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages16
ISBN (Electronic)978-1-62410-578-4
Publication statusPublished - 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: 7 Jan 201911 Jan 2019


ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego
Internet address

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


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