A hydrodynamics-based model of a rowing stroke simulating effects of drag and lift on oar blade efficiency for various cant angles

Sliasas, Andrew; Tullis, S.

doi:10.1016/j.proeng.2010.04.078

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Based on the propulsive force, F propulsive = m Total /a rowing , the average acceleration of 3.12 m/s 2 with the total mass of 88 kg (70 kg (Single rower) + 14 kg (Scull boat) + 4 kg (Oar and equipment)) produced 274 N force. This value is valid based on the estimated blade force ranging between 107-393 N as reported in the previous studies [25,36,44,47,55,56]. However, 274 N of blade force from the calculation is considered after 20 % energy loss, hence, before losses happen the initial blade force generated will be 308 N [24].…”

Section: Boat Velocitymentioning

confidence: 76%

Rowing Biomechanics, Physiology and Hydrodynamic: A Systematic Review

et al. 2020

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According to numerous studies, rowing performance is influenced by several factors including rower’s biomechanics, rower’s physiology, the force generated and stroke style. However, there is a missing gap linking such factors with rowing performance in the available literature. This paper aims to investigate the rowing mechanism in terms of rower anthropometry and physiology, which can impact its biomechanics and performance. The corresponding hydrodynamic force generated by the oar blade to accelerate the boat is also considered in the current study. To test the objectives, systematical online searching was conducted in search of the inclusion literature criteria. All included studies used Preferred Reporting item for Systematic Review and Meta-analysis (PRISMA) guidelines to obtain the final collection of articles for this review. In order to rate the quality of the articles, risk bias assessment was performed. A total of 35 studies were included in the assessment. The studies discussed the aspects of anthropometry and physiological of the rower, the biomechanics of the rower, corresponding hydrodynamic force on the oar blade and the rowing mechanism concerning boat performance. Based on the information obtained, an understanding of the important aspects of the rowing mechanism was achieved to provide an update for comprehensive improvement.

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Section: Boat Velocitymentioning

confidence: 76%

Rowing Biomechanics, Physiology and Hydrodynamic: A Systematic Review

et al. 2020

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“…Yet the results are unphysical at some point, especially for the propulsive force which is momentarily and unexpectedly negative. This default was corrected in another paper published later [20]. Leroyer et al [8] performed simulations reproducing a simplified rowing stroke but with a dynamic similar to a real one, especially for the free surface deformation.…”

Section: Introductionmentioning

confidence: 99%

Validation of CFD simulations of the flow around a full-scale rowing blade with realistic kinematics

et al. 2018

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This article deals with the validation of the modelling and numerical simulation of a rowing stroke, by means of CFD. Simplified but realistic strokes were performed in a towing tank with a rotating arm and a real flexible oar. Those laboratory conditions are better controlled than those of in situ trials. An FSI procedure is developed to take into account the oar bending, which is essential in the physics of this flow. The results show that this numerical framework is able to reproduce qualitatively the real flow including the breaking of the free surface around the blade and the transport of the air cavity behind it. The profiles of forces are well reproduced, with propulsive forces overestimated by 5-12% for their maxima. The study also focuses on the computation of the uncertainties. It is highlighted that, even for this well-controlled experimental equipment, the uncertainties on the quantities of interest are of about 11%. In other words, the experimental uncertainty covers the numerical errors. So, this numerical modelling is validated and can be used for design and optimisation of blades and oars, or to contribute to the better understanding of the boat-oar-rower system and its dynamics.

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“…Côté numérique, l'augmentation de la puissance des moyens de calculs et la maturité grandissante des outils de simulation numérique (encore dénommés CFD pour Computational Fluid Dynamics) rendent possibles des simulations prenant en compte des mouvements complexes de corps de forme quelconque en présence d'une surface libre fortement perturbée (Sliasas & Tullis, 2010 ;Kinoshita et al, 2007). Au Laboratoire de Mécanique des Fluides (LMF), les premières validations numériques, s'appuyant sur la comparaison avec des essais en bassin ont ainsi permis de mettre en évidence les deux influences fondamentales (instationnarité et surface libre) mettant ainsi en défaut les modèles reposant sur une approche quasi-statique.…”

Section: Introductionunclassified

Mesures et simulations : démarche et étapes pour une meilleure connaissance de l'hydrodynamique des palettes d'aviron

Leroyer¹,

Barré²,

Kobus³

2012

Movement &Amp; Sport Sciences

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L'objectif de cet article est de décrire l'état des travaux expérimentaux et numériques réalisés au Laboratoire de Mécanique des Fluides de l'École Centrale de Nantes pour étudier l'écoulement autour des palettes d'aviron et de montrer leur complémentarité. Sont présentées les étapes franchies et à franchir pour parvenir à modéliser de façon fiable cet écoulement dans le cas de palettes et de coup d'aviron réel. L'objectif est de se donner les moyens de comprendre et d'analyser l'écoulement et de calculer précisément les efforts appliqués. En particulier, l'importance fondamentale de l'instationnarité et de la surface libre dans ce type d'écoulement est mise en évidence. Cette conclusion est fondée sur la confrontation entre, d'une part, des résultats d'essais en bassin des carènes sur des coups d'aviron simplifiés, et d'autre part, des simulations numériques réalisées sur ces mêmes coups avec différents modèles physiques et configurations choisies à cet effet. La présentation des étapes suivantes s'appuie sur un calcul probatoire portant sur un aviron flexible à l'échelle 1 reproduisant un fonctionnement réel.

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A hydrodynamics-based model of a rowing stroke simulating effects of drag and lift on oar blade efficiency for various cant angles

Cited by 5 publications

References 7 publications

Rowing Biomechanics, Physiology and Hydrodynamic: A Systematic Review

Rowing Biomechanics, Physiology and Hydrodynamic: A Systematic Review

Validation of CFD simulations of the flow around a full-scale rowing blade with realistic kinematics

Mesures et simulations : démarche et étapes pour une meilleure connaissance de l'hydrodynamique des palettes d'aviron

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