Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session J05: Aeroacoustics I
4:35 PM–6:32 PM,
Sunday, November 19, 2023
Room: 102A
Chair: Benshuai Lyu, Peking University
Abstract: J05.00009 : Nozzle flow acoustics with wall-friction and entropy two-dimensionality*
6:19 PM–6:32 PM
Presenter:
Aimee S Morgans
(Imperial College London)
Authors:
Aimee S Morgans
(Imperial College London)
Xiao Hu
(Imperial College London)
Juan Guzmán-Iñigo
(City, University of London)
Saikumar R Yeddula
(Imperial College London)
Collaboration:
-
The present work extends this to nozzle flows with wall friction and two-dimensionality in which entropy perturbations have both radial and axial dependence. The analytical framework is developed, with frequency, wall-friction coefficient and an entropy “two-dimensionality” coefficient all incorporated as Magnus expansion parameters. Resulting predictions of entropy noise are validated against numerical simulations. The agreement confirms that the Magnus expansion is a powerful semi-analytical tool suitable for replacing full numerical simulations across a broad range of nozzle acoustic problems.
*Funding from the European Research Counccil (Consolidator Grant AFIRMATIVE, 2018-23) is acknowledged.
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