Experimental analysis of hydrofoil hydroelastic trailing edge vibrations
Communication avec acte
This paper explores the conditions for hydro-elastic trailing edge vibrations on a NACA0015 aluminium hydrofoil clamped in a hydrodynamic tunnel. Test were performed for Reynolds numbers ranging from 2×10⁵ up to 9×10⁵ and various angle of attack, from 0 up to 10°. Laser vibrometry was used in order to describe the hydrofoil vibratory response. Time Resolved Particle Image Velocimetry (TR-PIV) was also used to visualise the flow and question the origin of the hydrodynamics excitation mechanism. This work aims to describe the different configurations generating strong coupling between the flow and a trailing edge structural eigenmode. It has been shown that vibrations of significant amplitude can be observed for a specific range of angle of attack from 3.5° to 8.5° and that the pressure surface boundary layer separation close to the trailing edge plays a key role in the hydrodynamics excitation mechanism.
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Article dans une revue avec comité de lectureFRANCOIS, Paul; LÈRE, Basile; AMANDOLESE, Xavier (The Society of Naval Architects and Marine Engineers, 2023-06-26)Strong correlation between boundary layer excitation and hydrofoil eigenmode occurs for specific angles of attack and Reynolds numbers, resulting in strong tonal noise emissions under certain circumstances. This study aims ...
Article dans une revue avec comité de lectureThis paper explores the conditions for hydroelastic trailing edge vibrations generating tonal noise on a NACA0015 aluminium hydrofoil clamped in a hydrodynamic tunnel. Tests were performed for Reynolds numbers, ranging ...
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Maxillary shape after primary cleft closure and before alveolar bone graft in two different management protocols: A comparative morphometric study Article dans une revue avec comité de lectureGIRINON, François; KETOFF, Serge; HENNOCQ, Quentin; KOGANE, Nicolas; ULLMANN, Nicolas; KADLUB, Natacha; GALLIANI, Eva; NEIVA-VAZ, Cécilia; VASQUEZ, Marie-Paule; PICARD, Arnaud; KHONSARI, Roman Hossein (Elsevier Masson, 2019)AIM AND SCOPE: Result assessment in cleft surgery is a technical challenge and requires the development of dedicated morphometric tools. Two cohorts of patients managed according to two different protocols were assessed ...