Monk, James, Gordon, William, Tutunea-Fatan, O. Remus et Bordatchev, Evgueni.
2025.
« Drag reduction performance of triangular riblets with various included angles immersed in water-glycerol mixture ».
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
This study presents the initial development of drag-reducing surfaces featuring streamwise triangular riblets at 30°, 60°, and 90°. It encompasses the design, microfabrication, and performance evaluation. Four acrylic cylindrical samples (drums), including one with a smooth surface, were fabricated by means of high-precision multi-axis single-point diamond cutting (SPDC) that yielded exceptional surface quality and form accuracy of <1 µm. The functional performance was assessed by means of a rheometer-based Taylor-Couette system that synchronously recorded frictional torque and angular position in the time domain at an angular speed of 230.6 rad/s. The 60° riblets demonstrated a 6.9% reduction in drag as measured through the decreased torque. Additional statistical metrics - such as standard deviation, amplitude-frequency characteristic, and probability density function - were used to evaluate the dynamics of riblet-fluid interactions. The findings of this study contribute to the further development of knowledge on drag-reducing functional surfaces with numerous potential applications in aerospace, automotive, marine, and energy sectors.
| 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 15:16 |
| Dernière modification: | 18 déc. 2025 15:16 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32463 |
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