Modeling Aeolian Tones by Global Instability Modes - Université de Poitiers
Communication Dans Un Congrès Année : 2022

Modeling Aeolian Tones by Global Instability Modes

Résumé

A noise prediction approach is proposed for bluff body wakes such as flow over a cylinder, where the primary noise source comprises of large scale coherent structures such as the vortex shedding flow feature. With the aim of developing low-order noise models, the strategy of this work is to extract and model such coherent structures. The modeling is based on a linear global stability analysis on the time-averaged mean flow to extract the dominant structures, whose amplitudes are then calibrated via two-point statistics. Curle's analogy is then implemented for far-field noise predictions. The overall approach is validated for flow over a circular cylinder for two cases of Reynolds numbers, Re=150 and 13000, and the noise predictions are found to be <2dB off from the actual measurements.
Fichier principal
Vignette du fichier
Prinja_AIAAP_2022_model.pdf (1.5 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence
Copyright (Tous droits réservés)

Dates et versions

hal-04443811 , version 1 (07-02-2024)

Licence

Copyright (Tous droits réservés)

Identifiants

Citer

Robin Prinja, Peter Jordan, Florent Margnat. Modeling Aeolian Tones by Global Instability Modes. 28th AIAA/CEAS Aeroacoustics 2022 Conference, Jun 2022, Southampton, United Kingdom. pp.AIAA 2022-2917, ⟨10.2514/6.2022-2917⟩. ⟨hal-04443811⟩
9 Consultations
20 Téléchargements

Altmetric

Partager

More