Wind-tunnel experiment on aerodynamic characteristics of a runner using a moving-belt system. Issue 1 (31st December 2016)

• Record Type: Journal Article
• Authors: Inoue, Tatsuya; Okayama, Takafumi; Teraoka, Takahiro; Maeno, Satoshi; Hirata, Katsuya
• Other Names: Jin Zhongmin reviewing-editor.
• Is Part Of: Cogent engineering. Volume 3:Issue 1(2016)
• Publication Date: 2016-12-31
• Subjects: wind-tunnel -- moving belt -- ground effect -- track runner -- air resistance; Engineering -- Periodicals; Technology -- Periodicals; Engineering; Technology; Periodicals; 620
• DOI: Https://www.tandfonline.com/doi/10.1080/23311916.2016.1231389
• Languages: English
• ISSNs: 2331-1916

Abstract

Abstract: Wind-tunnel experiments are the most effective approaches both to elucidate the flows around runners in track-and-field athletics, and to evaluate their air resistances. In the present study, we develop a moving-belt system, and show its basic performance, such as the distributions of time-mean flow velocity and turbulent intensity above the moving-belt using a hot-wire anemometer. As a result, we have confirmed the effective improvement of the velocity distributions in terms of flow uniformity and turbulence reduction, especially near the moving-belt surface. Following, using this the developed moving-belt system, we investigate the air resistance on a runner in solo running and in duet running. For solo running, we reveal an increase in air resistance of more than 10% in comparison with the conventional result with no moving-belt system. For duet running, we reveal the optimum duet-running formation where a following runner behind a pacemaker experiences small air resistances or strong drafts.