The effects of inner boundary layer thickness on the near pressure field of a subsonic jet - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

The effects of inner boundary layer thickness on the near pressure field of a subsonic jet

Résumé

In this work, the effects of the jet's initial conditions on the aeroacoustic properties are studied. The present investigation has been carried out using a Large Eddy Simulation (LES) database containing pressure time series covering a domain that varies in the stream-wise direction from x=0 up to x/D=20 and in the radial direction from r/D=0.5 (nozzle lip) up to r/D=3, where D is the jet exit diameter. As mentioned above, the key parameter we explored is the boundary-layer thickness (δ BL), which has been varied keeping fixed the nozzle exhaust turbulence intensity at T I = 0%. Specifically, the value of δ BL , normalised by the nozzle radius r 0 , spans from 0.025 up to 0.4. The acoustic component of the near pressure field of the jet is extracted by applying a wavelet-based procedure to the pressure data. The decomposed signals are then analysed separately in terms of statistical quantities.
Fichier principal
Vignette du fichier
Meloni_FA2023.pdf (2.97 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04402222 , version 1 (18-01-2024)

Licence

Paternité

Identifiants

Citer

Stefano Meloni, Matteo Mancinelli, Roberto Camussi, Christophe Bogey. The effects of inner boundary layer thickness on the near pressure field of a subsonic jet. 10th Convention of the European Acoustics Association, Sep 2023, Torino, Italy. pp.5957-5962, ⟨10.61782/fa.2023.0970⟩. ⟨hal-04402222⟩
21 Consultations
6 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More