Aerodynamic hysteresis of a discus

Kazuya Seo, Ken Ohta, Yuji Ohgi, Yuji Kimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper describes the hysteresis in the aerodynamic properties of a discus near to its stalling angle. Wind tunnel tests were carried out with a full-size woman's discus. The experimental aerodynamic data D, L and M were obtained from wind tunnel tests as functions of the angle of attack and the spin rate. It was found that the drag, lift and pitching moment coefficients, C D CL and CM, increase with increasing the angle of attack up to a stalling angle of 28-30°. Beyond the stalling angle, CL and CM decrease suddenly and abruptly with increasing angle of attack. On the other hand, recovery from the stall does not occur at the same stalling angle of 28-30° when the angle of attack decreases from the stall state; recovery actually occurs at 25°. The CL -α (angle of attack) curve is almost the same when the angle of attack is less than 24°. Therefore, hysteresis occurs near the stalling angle.

Original languageEnglish
Title of host publicationProcedia Engineering
Pages294-299
Number of pages6
Volume60
DOIs
Publication statusPublished - 2013
Event6th Asia-Pacific Conference on Sports Technology, APCST 2013 - Hong Kong, Hong Kong
Duration: 2013 Sep 182013 Sep 20

Other

Other6th Asia-Pacific Conference on Sports Technology, APCST 2013
CountryHong Kong
CityHong Kong
Period13/9/1813/9/20

Fingerprint

Angle of attack
Hysteresis
Aerodynamics
Wind tunnels
Recovery
Drag

Keywords

  • Aerodynamics
  • Discus
  • Hysteresis

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Seo, K., Ohta, K., Ohgi, Y., & Kimura, Y. (2013). Aerodynamic hysteresis of a discus. In Procedia Engineering (Vol. 60, pp. 294-299) https://doi.org/10.1016/j.proeng.2013.07.020

Aerodynamic hysteresis of a discus. / Seo, Kazuya; Ohta, Ken; Ohgi, Yuji; Kimura, Yuji.

Procedia Engineering. Vol. 60 2013. p. 294-299.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Seo, K, Ohta, K, Ohgi, Y & Kimura, Y 2013, Aerodynamic hysteresis of a discus. in Procedia Engineering. vol. 60, pp. 294-299, 6th Asia-Pacific Conference on Sports Technology, APCST 2013, Hong Kong, Hong Kong, 13/9/18. https://doi.org/10.1016/j.proeng.2013.07.020
Seo K, Ohta K, Ohgi Y, Kimura Y. Aerodynamic hysteresis of a discus. In Procedia Engineering. Vol. 60. 2013. p. 294-299 https://doi.org/10.1016/j.proeng.2013.07.020
Seo, Kazuya ; Ohta, Ken ; Ohgi, Yuji ; Kimura, Yuji. / Aerodynamic hysteresis of a discus. Procedia Engineering. Vol. 60 2013. pp. 294-299
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