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Wind and Structures Volume 34, Number 1, January 2022 (Special Issue) pages 101-113 DOI: https://doi.org/10.12989/was.2022.34.1.101 |
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Experimental characterization of the lateral and near-wake flow for the BARC configuration |
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Elena Pasqualetto, Gianmarco Lunghi, Benedetto Rocchio, Alessandro Mariotti and Maria Vittoria Salvetti
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| Abstract | ||
| We experimentally investigate the high-Reynolds flow around a rectangular cylinder of aspect ratio 5:1. This configuration is the object of the international BARC benchmark. Wind tunnel tests have been carried out for the flow at zero angle of attack and a Reynolds number, based on the crossflow cylinder length and on the freestream velocity, equal, to 40 000. Velocity measurements are obtained by using hot-wire anemometry along 50 different cross-flow traverses on the cylinder side and in the near wake. Differential pressure measurements are acquired on multiple streamwise sections of the model. The obtained measurements are in a good agreement with the state-of-the-art experiments. For the first time among the several contributions to the BARC benchmark, detailed flow measurements are acquired in the region near the cylinder side and in the near-wake flow. The edges and the thickness of the shear layers detaching from the upstream edges are derived from velocity measurements. Furthermore, we compute the flow frequencies characterizing the roll-up of the shear layers, the evolution of vortical structures near the cylinder side and the vortex shedding in the wake. | ||
| Key Words | ||
| BARC benchmark; hot-wire anemometry; lateral and near-wake flow features; pressure measurements; windtunnel experiments | ||
| Address | ||
| Elena Pasqualetto: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy Gianmarco Lunghi: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy Benedetto Rocchio: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy Alessandro Mariotti: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy Maria Vittoria Salvetti: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy | ||