Chhetri, Ashim, Hammond, Keziah Naa Densua, Kodie-Ampaw, Joseph Kwabena, Bonsi, Adime Kofi et Essel, Ebenezer Ekow.
2025.
« Effect of partial sheltering on spanwise wake interference of unequal-height tandem circular cylinders ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
Time-resolved particle image velocimetry is used to investigate the effects of partial sheltering on the unsteady wake dynamics of unequal-height tandem cylinders submerged in a turbulent boundary layer (TBL). The height ratio of the cylinders was kept constant at ℎ/▯ = 0.75 based on the aspect ratios of ℎ/▯ = 5.3 for the upstream (UC) and ▯/▯ = 7.0 for the downstream (DC) cylinders, where ℎ and ▯ represent the height of the UC and DC, respectively and ▯ the diameter of the cylinders. The center-to-center spacing between the cylinders was 4▯, Reynolds number based on the cylinder diameter (▯) was 5540 and the submergence ratio was ▯/▯ = 1.2, where ▯ is the TBL thickness. Measurements were performed in three streamwise-spanwise planes along the height of the tandem cylinders (TC) and single cylinder (SC) identical to the DC. The results showed that wake interference by the DC enhanced the near wall reverse flow region, while reducing the vortex shedding frequency behind the UC compared to the SC. For the DC, the enhanced flow entrainment from the side accelerated the vortex formation of larger structures in the sheltered region, while delaying the vortex formation at the unsheltered free end. As a result, the reverse flow region was reduced in the sheltered portion but enhanced near the free end of the DC.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:09 |
| Dernière modification: | 18 déc. 2025 15:09 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32375 |
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