Analysis of flow-induced performance change ...
Document type :
Article dans une revue scientifique
Title :
Analysis of flow-induced performance change of cycloidal rotors: Influence of pitching kinematic and chord-to-radius ratio
Author(s) :
Shi, Lei [Auteur]
JiangSu University
Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL]
Bayeul-Lainé, Annie-Claude [Auteur]
Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL]
Coutier-Delgosha, Olivier [Auteur]
Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL]
Virginia Tech [Blacksburg]
JiangSu University
Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL]
Bayeul-Lainé, Annie-Claude [Auteur]
Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL]
Coutier-Delgosha, Olivier [Auteur]
Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL]
Virginia Tech [Blacksburg]
Journal title :
Ocean Engineering
Publisher :
Elsevier
Publication date :
2022-11
ISSN :
0029-8018
Keyword(s) :
Ocean Engineering
Environmental Engineering
Cycloidal rotor
Low Reynolds number flow
Pitching kinematics
Chord-to-radius ratio
Environmental Engineering
Cycloidal rotor
Low Reynolds number flow
Pitching kinematics
Chord-to-radius ratio
HAL domain(s) :
Sciences de l'ingénieur [physics]
French abstract :
As a new type of the propulsive devices, cycloidal rotor has been attracting more attention recently. The presentwork concentrates on the analysis of the performance and internal flow field of a two-bladed cycloidal ...
Show more >As a new type of the propulsive devices, cycloidal rotor has been attracting more attention recently. The presentwork concentrates on the analysis of the performance and internal flow field of a two-bladed cycloidal rotoroperating at low Reynolds numbers, with special emphasis on understanding how the flow structure affects theperformance at different working conditions. The symmetrical/asymmetrical pitching motions are evaluatedinitially and the primary results show that the asymmetrical pitching with a mean pitching angle of 5◦ improvesthe efficiency of the rotating system. Then, the effect of the chord-to-radius ratio at three different conditions isdiscussed, which shows that the chord-to-radius ratio of 0.45 is the best value to maximise the performance. Theflow pattern, involving the blade-wake interaction, wake-wake interaction, three vortex structures on the bladesurface, roll-up vortices inside the laminar boundary layer, separation bubble, leading-edge vortex, trailing-edgevortex and flow separation vortex, are discussed in detail under various operating conditions. The study on theperformance of a single blade, the forces (lift and drag) distributions, the blade loadings and the near-wall flowson two blades, provide a new understanding of the global performance change of the propeller.Show less >
Show more >As a new type of the propulsive devices, cycloidal rotor has been attracting more attention recently. The presentwork concentrates on the analysis of the performance and internal flow field of a two-bladed cycloidal rotoroperating at low Reynolds numbers, with special emphasis on understanding how the flow structure affects theperformance at different working conditions. The symmetrical/asymmetrical pitching motions are evaluatedinitially and the primary results show that the asymmetrical pitching with a mean pitching angle of 5◦ improvesthe efficiency of the rotating system. Then, the effect of the chord-to-radius ratio at three different conditions isdiscussed, which shows that the chord-to-radius ratio of 0.45 is the best value to maximise the performance. Theflow pattern, involving the blade-wake interaction, wake-wake interaction, three vortex structures on the bladesurface, roll-up vortices inside the laminar boundary layer, separation bubble, leading-edge vortex, trailing-edgevortex and flow separation vortex, are discussed in detail under various operating conditions. The study on theperformance of a single blade, the forces (lift and drag) distributions, the blade loadings and the near-wall flowson two blades, provide a new understanding of the global performance change of the propeller.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Source :
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