In wind tunnel the reproduction of vortex shedding behind circular cylinders at high Reynolds number regimes is incomplete

Øyvind Mortveit Ellingsen (1, 2) , Xavier Amandolese (3, 1) , Pascal Hémon (1)

1 LadHyX - Laboratoire d'hydrodynamique
2 CSTB - Centre Scientifique et Technique du Bâtiment
3 LMSSC - Laboratoire de Mécanique des Structures et des Systèmes Couplés

Wind tunnel tests of 2D rough cylinders are presented. The goal is to simulate the alternate vortex shedding in flow regimes encountered in wind engineering applications, where the full scale Reynolds number is larger than the one that can be reproduced in wind tunnel with small scaled models. Measurements are mainly the synchronized unsteady wall pressures on the cylinder which are post processed using bi-orthogonal decompositions. By comparing the small scale results with those from a previous large scale experiment, we show that the technique of rough cylinder is incomplete and can approach roughly global parameters only.

Domains: Fluid mechanics [physics.class-ph]

Øyvind Mortveit Ellingsen, Xavier Amandolese, Pascal Hémon. In wind tunnel the reproduction of vortex shedding behind circular cylinders at high Reynolds number regimes is incomplete. 12th International Conference on Flow-Induced Vibrations, Jul 2022, Paris-Saclay, France. ⟨hal-04070778⟩