Cycling Aerodynamics

Gibertini, G.; Grassi, D.

doi:10.1007/978-3-211-89297-8_3

Cited by 22 publications

(21 citation statements)

References 10 publications

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“…Unlike streamlined bodies, where the viscous tangential wall shear stress forces contribute the largest proportion to aerodynamic drag, the aerodynamic resistance in cycling is mainly from pressure drag [8]. Flow separation around cyclists results in the formation of a turbulent wake and large-scale low-pressure vortices as depicted in Fig.…”

Section: Fluid Dynamics Of Cycling 21 Bluff Body Aerodynamicsmentioning

confidence: 99%

“…Nowadays, it is more common to measure aerodynamic forces with the cyclists pedalling and the wheels rotating, which provides a better representation of road/track cycling conditions. The rotation of the wheels has been achieved using mechanical roller/belt drives [8] and systems utilising electric motors [2]. The same approach can be taken to measure the forces on a bicycle, in the absence of a cyclist.…”

Section: Wind Tunnel Measurement Techniquesmentioning

confidence: 99%

“…Other studies by Gibertini and Grassi [8] have also looked at the effect that position can have on how streamlined a rider is. In contrast to findings by Zdravkovich et al [53], wind tunnel tests of an experienced rider in the stem, brakes hoods, drops, and time-trial positions revealed that the most streamlined position for this rider (indicated by the drag coefficient) was not that of the timetrial position (0.792) but of the brakes hood position (0.760).…”

Section: Wind Tunnel Testing Of Rider Positionmentioning

confidence: 99%

“…8 The traditional positions and the time-trial position. Reprinted from Gibertini and Grassi [8], p 32-33, with permission from Springer position, frontal area is not always the dominant factor when comparing the aerodynamic drag of different riders in similar positions. It is a common misconception that the most aerodynamic riders and positions are the ones that also exhibit the smallest possible frontal area.…”

Section: Wind Tunnel Testing Of Rider Positionmentioning

confidence: 99%

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Riding against the wind: a review of competition cycling aerodynamics

et al. 2017

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Aerodynamics has such a profound impact on cycling performance at the elite level that it has infiltrated almost every aspect of the sport from riding position and styles, equipment design and selection, race tactics and training regimes, governing rules and regulations to even the design of new velodromes. This paper presents a review of the aspects of aerodynamics that are critical to understanding flows around cyclists under racing conditions, and the methods used to evaluate and improve aerodynamic performance at the elite level. The fundamental flow physics of bluff body aerodynamics and the mechanisms by which the aerodynamic forces are imparted on cyclists are described. Both experimental and numerical techniques used to investigate cycling aerodynamic performance and the constraints on implementing aerodynamic saving measures at the elite level are also discussed. The review reveals that the nature of cycling flow fields are complex and multi-faceted as a result of the highly three-dimensional and variable geometry of the human form, the unsteady racing environment flow field, and the non-linear interactions that are inherent to all cycling flows. Current findings in this field have and will continue to evolve the sport of elite cycling while also posing a multitude of potentially fruitful areas of research for further gains in cycling performance.

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Section: Fluid Dynamics Of Cycling 21 Bluff Body Aerodynamicsmentioning

confidence: 99%

Section: Wind Tunnel Measurement Techniquesmentioning

confidence: 99%

Section: Wind Tunnel Testing Of Rider Positionmentioning

confidence: 99%

Section: Wind Tunnel Testing Of Rider Positionmentioning

confidence: 99%

See 2 more Smart Citations

Riding against the wind: a review of competition cycling aerodynamics

et al. 2017

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show abstract

“…Thus, due to the rather high velocity (in the order of 50 km/h), the aerodynamic resistance acting on a time-trial racer is about the 90% of the total resistance. Aerodynamics is thus very important for the cyclists performances and many experimental studies, addressed to find the best cyclist position as well as the best articles, have been carried out in the past (Garcia-Lopez et al, 2008;Gibertini & Grassi, 2008;Grappe et al, 1997;Lukes et al, 2005). Furthermore, although they are outside of the subject of the present treatise, some interesting computational works begin to appear in literature (see for example Defraeye et al (2010a;).…”

Section: Introductionmentioning

confidence: 94%