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Towards flow field measurements around dynamic cross-country skiers
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-4916-9566
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Sports Tech Research Centre, Department of Engineering, Mathematics, and Science Education, Mid Sweden University, Östersund, Sweden.ORCID iD: 0000-0002-8820-1610
2024 (English)In: Current Issues in Sport Science (CISS), E-ISSN 2414-6641, Vol. 9, no 3, article id 006Article in journal (Refereed) Published
Abstract [en]

Flow field measurements around cross-country skiers (xc skiers) are lacking in the literature to date. The aim was therefore to investigate the possibility of using particle tracking velocimetry for visualization and measurement of the flow field around xc skiers roller skiing on a treadmill in a wind tunnel. The airflow was seeded with neutrally buoyant helium-filled soap bubbles as tracer particles, following the flow without affecting it. As illumination, two different approaches were tested: first, a laser in the cameras’ line of sight (sagittal plane), then an LED unit directed vertically in a narrow slice, clearly limiting the depth of the measurement volume in the cameras’ line of sight. The flow field was studied at various speeds (3-7 m/s) around a single skier as well as around two skiers in line with the streaming airflow. It was found that the experimental approach has the potential to provide detailed insights, both qualitatively and quantitatively, into the flow field dynamics. The main challenges regarding setup, illumination, seeding, and cameras were identified, and possible improvements to streamline the experimental methodology were discussed. 

Place, publisher, year, edition, pages
Bern Open Publishing , 2024. Vol. 9, no 3, article id 006
Keywords [en]
Cross-country skiing, flow field visualization, particle tracking velocimetry, wind tunnel, aerodynamics
National Category
Fluid Mechanics Applied Mechanics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-105501DOI: 10.36950/2024.3ciss006OAI: oai:DiVA.org:ltu-105501DiVA, id: diva2:1858372
Conference
Ninth International Congress onScience and Skiing (ICSS 2023) Saalbach, Austria, March 18-22, 2023
Funder
Swedish Agency for Economic and Regional Growth, 20202610European Regional Development Fund (ERDF), 20202610
Note

Validerad;2024;Nivå 1;2024-05-16 (hanlid);

Full text license: CC BY-NC

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2025-02-05Bibliographically approved

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Larsson, Sofia I.A.Lycksam, Henrik

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