Direct measurement of steady fluid forces upon a deformed cylinder in confined axial flow - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Fluids and Structures Année : 2021

Direct measurement of steady fluid forces upon a deformed cylinder in confined axial flow

Résumé

This paper addresses the case of a cylinder array in axial flow at Reynolds numbers from 60 000 to 110 000. A comprehensive experimental and numerical study of the steady fluid forces arising from a geometrical perturbation in the array arrangement is carried out and compared with a semi-empirical model from the literature. The test rig consists of a 3x3 confined cylinder bundle with a pitch-to-diameter ratio equal to 1.33. The central cylinder can be rotated, translated or bent. Global forces and moments as well as pressure profiles at several sections are measured. Velocity profiles at both sides of the cylinder are also collected. Additionally, RANS simulations (Reynolds-averaged Navier–Stokes) are carried out. Pressure loss effects similar to the ones occurring in hydraulic pipes are found to play a major role on the velocity field. Rotation tests are in agreement with the literature: at low angles of incidence, the lift force is proportional to the angle. The supporting rod at the centre of the cylinder strongly disturbs the local lift force but does not change the global linear trend. In translation, the wake of the support generates a fluid stiffness effect. Bending tests allow to assess all terms of the semi-empirical model from the literature, which proves to be quite accurate at a sufficient distance from the ends and from the supports. In addition, the investigation provides refined quantitative measurements of local and global force coefficients of the statically deformed cylinder in rotation, translation and bending.
Fichier principal
Vignette du fichier
Joly_et_al_JFS_2021.pdf (2.19 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04495592 , version 1 (08-03-2024)

Identifiants

Citer

Aurélien Joly, Nicolas de Buretel de Chassey, Alexandre Martin, Olivier Cadot, Luc Pastur, et al.. Direct measurement of steady fluid forces upon a deformed cylinder in confined axial flow. Journal of Fluids and Structures, 2021, 104, pp.103326. ⟨10.1016/j.jfluidstructs.2021.103326⟩. ⟨hal-04495592⟩
16 Consultations
5 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More