Optimization of oar blade design for improved performance in rowing

Caplan, Nick; Gardner, Trevor

doi:10.1080/02640410701203468

Cited by 21 publications

(44 citation statements)

References 5 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the first step in creating a numerical simulation of the rowing stroke, the experimental configuration of Caplan and Gardner [6] was modelled using CFD. The ability of the simulation to accurately replicate their experimental results would verify the validity of the numerical model.…”

Section: Numerical Model Validationmentioning

confidence: 99%

“…Other attempts to study the blade quantitatively focused on steady-state experiments, such as those of Caplan and Gardner [5,6]. In their experiments, a curved rectangular plate with the same curvature and projected surface area as a standard hatchet blade was held fixed in a flume as water was forced past [6].…”

Section: Introductionmentioning

confidence: 99%

“…An initial flow simulation reproduces the steady-state experiments of a quarter-scale blade in a water flume performed by Caplan and Gardner [6], allowing validation of the CFD model. The model blade is then enlarged to fullscale, and steadystate flow characteristics in open water conditions are compared to those at quarter-scale within the flume.…”

Section: Introductionmentioning

confidence: 99%

“…In their experiments, a curved rectangular plate with the same curvature and projected surface area as a standard hatchet blade was held fixed in a flume as water was forced past [6]. Sensors on the oar shaft were used to resolve the force of the water on the blade, which allowed drag and lift coefficients to be calculated.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical modelling of rowing blade hydrodynamics

Sliasas

Tullis

2009

Sports Eng

View full text Add to dashboard Cite

The highly unsteady flow around a rowing blade in motion is examined using a three-dimensional computational fluid dynamics (CFD) model which accounts for the interaction of the blade with the free surface of the water. The model is validated using previous experimental results for quarter-scale blades held stationary near the surface in a water flume. Steady-state drag and lift coefficients from the quarter-scale blade flume simulation are compared to those from a simulation of the more realistic case of a full-scale blade in open water. The model is then modified to accommodate blade motion by simulating the unsteady motion of the rowing shell moving through the water, and the sweep of the oar blade with respect to the shell. Qualitatively, the motion of the free surface around the blade during a stroke shows a realistic agreement with the actual deformation encountered during rowing. Drag and lift coefficients calculated for the blade during a stroke show that the transient hydrodynamic behaviour of the blade in motion differs substantially from the stationary case.

show abstract

Section: Numerical Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical modelling of rowing blade hydrodynamics

Sliasas

Tullis

2009

Sports Eng

View full text Add to dashboard Cite

show abstract

“…Rowing movements involve both limb and trunk muscles, and requires well developed coordination and balance. During the years, different rowing techniques have been developed along with several modifications of the shell and oars [3,6,7]. Anyway, a successful rowing technique requires a maximization of the horizontal direction of rowing (parallel to the water), allowing the largest part of the force to be actually used for propulsion [4,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Three-Dimensional Study of Body Motion During Ergometer Rowing

Sforza¹

2012

TOSMJ

View full text Add to dashboard Cite

Abstract:Background: Rowing movements can be simulated using specialized ergometers; the method can be used both for training and indoor assessment of body movements within controlled conditions.Purpose: To perform a three-dimensional quantitative analysis of body movements during ergometer rowing, and to examine if there is a relationship between anthropometry and rowing kinematics. Study Design: Descriptive Laboratory StudyMethods: Body movements were recorded in 18 high-level oarsmen during ergometer rowing at 28 strokes/min. The three-dimensional movements of 21 body landmarks (left and right ankle, knee, greater trochanter, hip, shoulder, elbow, wrist, tragus; spinous process of C7, T2, T12, L2, L4) were detected by an optoelectronic instrument. Using dedicated software¸ the range of motion of the posterior angles of the cervical, thoracic and lumbar spine segments relative to the horizontal axis; the angles between greater trochanter-knee-ankle and between knee-ankle and the ground; head rotation and tilt; leg and upper limb symmetry, were computed. Results:The head and neck were approximately in line with the horizontal at catch, and extended at finish, with limited horizontal and frontal plane inclinations. Thoracic spine extension during the stroke was on average 68°. Lumbar spine range of motion was on average 59°, and it was smaller in weightier oarsmen. Upper limbs were symmetric, and a complete, symmetric extension of the lower limbs was made. At catch the legs were nearly perpendicular to the ground. Conclusions:The method allowed the measurement of the kinematic characteristics of the body during ergometer rowing. The measurements agreed with conventional technical teaching.Clinical Relevance: Data collected on high-level rowers can provide a set of standard quantitative execution parameters that can be used by coaches as a benchmark for the assessment of technical movements in all rowers.

show abstract

Real-time rowing simulator with multimodal feedback

et al. 2009

View full text Add to dashboard Cite

Efficient rowing requires both physical and technical abilities of the human. Teaching and learning of the technical abilities is thereby mainly restricted to on-water training. The aim of this project was to develop a rowing simulator. This simulator should serve as a high-level indoor training tool that can be used by rowing novices and professionals. The users should perceive acoustic, visual, and haptic cues about their current performance and their environment in real time.The newly-developed rowing simulator consists of a rowing boat hull equipped with multiple position sensors attached to the oar and seat. The boat hull was mounted on a podium placed inside a Cave setup. The Cave comprises projection screens, a loudspeaker system, and actuated winches for visual, acoustic, and haptic feedback, respectively. A mathematical real-time rowing model was developed, which computes the boat velocity and the oar force as a function of the movement of the oar and the user. All relevant boat, oar, and user parameters can be arbitrarily set, thus allowing the simulation of different boat types.The rowing model was validated by comparing results of the simulation with data from on-water measurements. Both the boat velocity and the oar force predicted by the model correlated highly with the experimentally-obtained data. Furthermore, the rowing simulator was successfully tested with professional rowers who rated the level of realism and the applicability of the simulator for indoor training as high. Based on the feedback of the rowers, various hardware and software extensions are planned for the simulator, including an increase of the number of actuated degrees of freedom of the boat and the oar, in order to improve the haptic feedback. r

show abstract

Optimization of oar blade design for improved performance in rowing

Cited by 21 publications

References 5 publications

Numerical modelling of rowing blade hydrodynamics

Numerical modelling of rowing blade hydrodynamics

A Three-Dimensional Study of Body Motion During Ergometer Rowing

Real-time rowing simulator with multimodal feedback

Contact Info

Product

Resources

About