Near wake of an Ahmed body: analysis of switches and base pressure-velocity relationship - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Near wake of an Ahmed body: analysis of switches and base pressure-velocity relationship

Résumé

We perform the flow behind a squareback Ahmed body using DNS. The dynamics of the flow is analyzed by Proper Orthogonal Decomposition to extract its main characteristics. We focus on the relationship between the base pressure and the near-wake velocity field. The dynamics of the switches due to bimodal behavior of the flow is also considered. The linear stochastic estimation technique [4] is applied to estimate the base pressure modes from the wake flow field and vive-versa. We show that the velocity-based estimator can recover dominant base pressure fluctuations and that the pressure-based estimator can detect velocity deviation and switch mode but fails to capture shedding modes.
Fichier principal
Vignette du fichier
Aerovehicles5_Pellerin.pdf (319.44 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04406619 , version 1 (19-01-2024)

Identifiants

  • HAL Id : hal-04406619 , version 1

Citer

Stéphanie Pellerin, Bérengère Podvin, Yann Fraigneau, Guillaume Bonnavion, Olivier Cadot. Near wake of an Ahmed body: analysis of switches and base pressure-velocity relationship. Fifth international conference in numerical and experimental aerodynamics of, road vehicles and trains (Aerovehicles 5), Jun 2023, Poitiers, France. ⟨hal-04406619⟩
24 Consultations
7 Téléchargements

Partager

Gmail Facebook X LinkedIn More