Wind-tunnel experiment on aerodynamic characteristics of a runner using a moving-belt system.

Autor: Inoue, Tatsuya1 (AUTHOR) euo1503@mail4.doshisha.ac.jp, Okayama, Takafumi1,2 (AUTHOR) duq0553@mail4.doshisha.ac.jp, Teraoka, Takahiro1,2 (AUTHOR) duq0573@mail4.doshisha.ac.jp, Maeno, Satoshi1,2 (AUTHOR) dup0578@mail4.doshisha.ac.jp, Hirata, Katsuya1,2 (AUTHOR) khirata@mail.doshisha.ac.jp, Jin, Zhongmin2,3,4 (AUTHOR)
Předmět:
Zdroj: Cogent Engineering. Dec2016, Vol. 3 Issue 1, pN.PAG-N.PAG. 1p.
Abstrakt: 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. [ABSTRACT FROM PUBLISHER]
Databáze: Library, Information Science & Technology Abstracts
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje