Drag Measurements on 2, 3 and 4 Car Platoons

Zabat, Michael; Frascaroli, Stefano; Browand, F. K.

doi:10.4271/940421

Cited by 38 publications

(24 citation statements)

References 7 publications

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“…Some experimental aerodynamic studies are dedicated to the inter-vehicle spacing effect (Pagliarella et al, 2007;Watkins and Vino, 2008;Marcu and Browand, 1999;Savas ß, 2000, 2001;Zabat et al, 1994;Abdel Azim and Abdel Gawad, 2000) on a platoon or tandem. The majority of these studies is limited to steady measurements.…”

Section: Introductionmentioning

confidence: 99%

LES of the flow around several cuboids in a row

Uystepruyst

Krajnović

2013

International Journal of Heat and Fluid Flow

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International audienceThis paper presents Large Eddy Simulations (LES) of flow around a four-vehicle platoon when one of the platoon members was forced to undergo in-line oscillations. The LES were made at the Reynolds number of 10 5 based on the height of the vehicles. Combinations of two different frequen-cies corresponding to non-dimensional frequencies at the Strouhal numbers St 1 = 0.025 and St 2 = 0.013 and two oscillation amplitudes were used in this study. The methodology was validated by comparisons with data from previous experimental investigations. In order to highlight the dynamic ef-fects, comparisons were made with steady results on a single vehicle and on a four-vehicle platoon. Large differences were found in the flow structures between quasi-steady and dynamic results. Furthermore, the behaviour of the drag coefficient of the upstream neighbor of the oscillating model was Preprint submitted to November 13, 2013 investigated

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Section: Introductionmentioning

confidence: 99%

LES of the flow around several cuboids in a row

Uystepruyst

Krajnović

2013

International Journal of Heat and Fluid Flow

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“…The addition of other riders, however, has received little prior attention due to the complexity of the problem, sensitivity of the results, and difficulty in carrying out experiments and computations. In other fields of bluff body aerodynamics ranging from simplified 2D cylinders, surface-mounted cubes, and more complex bluff body geometries such as racing cars, interaction effects between flows around multiple bodies are known to influence the aerodynamic force on both trailing and upwind bodies [86][87][88][89][90][91][92]. Over the past decade, advances in computing power and experimental techniques have opened up a line of enquiry into drafting effects in cycling, and in particular the team pursuit has provided the motivation to study multi-rider aerodynamics.…”

Section: Multi-rider Aerodynamics and Draftingmentioning

confidence: 99%

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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“…Platoon vehicles, which is defined as vehicles arranged into a column, keeping small distance and certain speed running in the United Nations FHWA intelligent traffic highway system project [10] . This is a qualitative definition, and it is difficult to quantitative analysis.…”

Section: Platoon Vehiclesmentioning

confidence: 99%