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Research for low resistance posture of cyclist based on wind tunnel experiments and computational fluid dynamics

Research Project

Project/Area Number 20K11413
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 59020:Sports sciences-related
Research InstitutionTokyo Institute of Technology (2022)
University of Tsukuba (2020-2021)

Principal Investigator

Hong Sungchan  東京工業大学, リベラルアーツ研究教育院, 研究員 (10638547)

Co-Investigator(Kenkyū-buntansha) 浅井 武  筑波大学, 体育系(名誉教授), 名誉教授 (00167868)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords自転車 / 空気抵抗 / 空気流れ / スポーツウェア / 風洞実験 / 数値計算
Outline of Research at the Start

本研究では,スポーツ風洞を用いて,自転車選手の姿勢変化が,空力特性に及ぼす影響について検討すると共に,粒子画像流速測定法及び,数値流体解析を用いたプレーヤーの姿勢による身体全体の空気流れと各部位の流れ(境界層の移動,渦の生成・成長・崩壊など)を高精度に可視化することで,自転車選手の姿勢が競技パフォーマンスに及ぼす流体力学的メカニズムを明らかにし,パフォーマンス向上方法を示す.

Outline of Final Research Achievements

In this study, the airflow around cycling athletes and its air resistance were examined using a CFD method and wind tunnel experiment. Specifically, this study is focused on how different surface shapes of fabrics of cycling suits affect the air resistance on cyclists. First, the CFD results indicated that the air resistance during a race is high on the head, arms, and legs of the cyclist. In the wind tunnel experiment, a cylinder model that resembles the shape of the arms was used to compare the aerodynamic forces of various fabrics, and the results showed that the air resistance changes according to the surface shape of the fabric. Moreover, the mannequin experiment revealed that by changing the fabric shape of the arms of the cycling suits, it is possible to reduce the air resistance by up to 8%.

Academic Significance and Societal Importance of the Research Achievements

レース中の自転車と選手が受ける抵抗の90%が空気抵抗になり、そのうちの70%は選手の体にかかる抵抗であると報告されている。そのため、空気抵抗を減らす適切な選手の姿勢などについての研究は多く報告されてきた。しかし、選手の全身に着るウェアに関する研究は数少ない。
本研究の結果から、選手が最大に走る最大速度と時間などのレース条件を考慮して、選手ごとに適切なウェアタイプの提供が可能になり、選手パフォーマンス向上に大きく貢献できると考えられる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (17 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] University of Lynchburg(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Seoul National University/Sungkyunkwan University(韓国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Sungkyunkwan University(韓国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Lynchburg(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] フットボールのバイオメカニクス-用具-2023

    • Author(s)
      洪性賛、川島昂亮、浅井武
    • Journal Title

      フットボール科学

      Volume: 18 Pages: 195-202

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Features of ball impact in straight, curve and knuckle kicks in soccer2022

    • Author(s)
      Kimachi Kaoru、Koido Masaaki、Hong Sungchan、Shimonagata Shuji、Nakayama Masao、Asai Takeshi
    • Journal Title

      Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology

      Volume: 1 Issue: 3 Pages: 1-10

    • DOI

      10.1177/17543371221101234

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Aerodynamic comparisons between Al Rihla and recent World Cup soccer balls2022

    • Author(s)
      Goff John Eric、Hong Sungchan、Asai Takeshi
    • Journal Title

      Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology

      Volume: 2 Pages: 1-22

    • DOI

      10.1177/17543371221140497

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Droplet evaporation on porous fabric materials2022

    • Author(s)
      Gon?alves Marta、Kim Jin Young、Kim Yeseul、Rubab Najaf、Jung Narina、Asai Takeshi、Hong Sungchan、Weon Byung Mook
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 1087-1087

    • DOI

      10.1038/s41598-022-04877-w

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Aerodynamics of the newly approved football for the English Premier League 2020?21 season2021

    • Author(s)
      Asai Takeshi、Hong Sungchan
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 9578-9578

    • DOI

      10.1038/s41598-021-89162-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Aerodynamic Differences between New and Used Soccer Balls2021

    • Author(s)
      Hong Sungchan、Asai Takeshi
    • Journal Title

      Applied Sciences

      Volume: 11 Issue: 16 Pages: 7204-7204

    • DOI

      10.3390/app11167204

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Aerodynamics of Cycling Skinsuits Focused on the Surface Shape of the Arms2021

    • Author(s)
      Hong Sungchan、Asai Takeshi
    • Journal Title

      Applied Sciences

      Volume: 11 Issue: 5 Pages: 2200-2200

    • DOI

      10.3390/app11052200

    • NAID

      120007188749

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] R&D of sports equipment in Japan2023

    • Author(s)
      Hong Sungchan
    • Organizer
      Global Sport Science Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Study of fluid drag acting on tandem car models2021

    • Author(s)
      Sonoki S, Monji H, Hong S, Asai T
    • Organizer
      The 16th International Symposium on Advanced Science and Technology in Experimental Mechanics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 隊列走行する自動車モデルが受ける流体抗力に関する研究2021

    • Author(s)
      園木翔大,文字秀明,浅井武,洪性賛
    • Organizer
      日本実験力学会 2021 年度(学会 20 周年)年次講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Improving athletic performance using sports aerodynamics2020

    • Author(s)
      Hong Sungchan
    • Organizer
      International Conference of Korean Society of Sport Biomechanics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] Contemporary Advances in Sports Science2021

    • Author(s)
      Francis Mundia Mwangi, Yasushi Enomoto, Sungchan Hong, Saravana Perumal Shanmugam, Xiaojie Tian, Elijah Gitonga Rintaugu, Noriyuki Fuku and Tetsuhiro Kidokoro
    • Total Pages
      336
    • Publisher
      IntechOpen
    • Related Report
      2021 Research-status Report
  • [Remarks] Having a Ball:

    • URL

      https://www.tsukuba.ac.jp/en/research-news/20210507140000.html

    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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