proceedings-49-00150.pdf (1.83 MB)

Comparing the aerodynamic behaviour of real footballs to a smooth sphere using tomographic PIV

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conference contribution
posted on 16.06.2020, 10:15 by Matthew Ward, Martin Passmore, Adrian Spencer, Andy Harland, Henry Hanson, Tim Lucas
Many studies have investigated the forces acting on a football in flight and how these change with the introduction or modification of surface features; however, these rarely give insight into the underlying fluid mechanics causing these changes. In this paper, force balance and tomographic particle image velocimetry (PIV) measurements were taken on a smooth sphere and a real Telstar18 football at a range of airspeeds. This was done under both static and spinning conditions utilizing a lower support through the vertical axis of the ball. It was found that the presence of the seams and texturing on the real ball were enough to cause a change from a reverse Magnus effect on the smooth ball to a conventional Magnus on the real ball in some conditions. The tomographic PIV data showed the traditional horseshoe-shaped wake structure behind the sphere and how this changed with the type of Magnus effect. It was found that the positioning of these vortices compared well with the measured side forces.

Funding

Engineering and Physical Sciences Research Council

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering
  • Mechanical, Electrical and Manufacturing Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Proceedings

Volume

49

Issue

1

Pages

150

Source

13th conference of the International Sports Engineering Association (ISEA 2020)

Publisher

MDPI

Version

VoR (Version of Record)

Rights holder

© The authors

Publisher statement

This is an Open Access Article. It is published by MDPI under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Publication date

2020-06-15

Copyright date

2020

ISSN

2504-3900

Language

en

Editor(s)

Motomu Nakashima, Takeo Maruyama and Yusuke Miyazaki

Location

Online

Event dates

22nd June 2020 - 26th June 2020

Depositor

Mr Matthew Ward Deposit date: 15 June 2020

Article number

150

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