Moving airstream in simulation exercises in ski jumping sport

Фотографии: 

ˑ: 

PhD, Associate Professor A.I. Popova1
G.Yu. Prokopenko1
Postgraduate student E.D. Klimov1
1Tchaikovsky State Institute of Physical Culture, Tchaikovsky

Objective of the study was to analyze ski jumpers’ actions in the flight phase; to examine the possibilities of constructing a simulator (wind tunnel) and determine the peculiarities of its use in simulation exercises.
Methods and structure of the study. The main research method applied in the study was the analysis of scientific and methodological literature, which was carried out with allowance for the structural features of modern ski jumping complexes and coaching experience.
Results of the study and conclusions. Simulation exercises are the main means of formation of technical skills in athletes. They closely approximate the competitive exercise structure.
Modern simulators create the conditions of the acceleration and take-off phases. Yet, there are no ready-made solutions for practicing the flight phase, which is only possible in conditions of real trampoline. At the same time, it was found that foreign athletes try practicing the flight phase in a horizontal wind tunnel. However, the airstream in such tunnels is different from the naturally moving airstream on the trampoline in the flight phase.
One of the possible solutions to this problem could be the design and construction of a special simulator - a wind tunnel that would simulate the real trampoline conditions, creating moving airstreams with changing angles. Similar designs are used in parachute trainings when practicing Wingsuit flights.

Keywords: ski jumping, simulation exercises, flight phase, airstream, wind tunnel, simulator.

References

  1. Brady H. Digital Experiences. Go for Gold: Olympic Aerodynamics [Electronic resource]. Available at: https://airandspace.si.edu/stories/editorial/go-gold-olympic-aerodynamics (date of access: 23.02.2018).
  2. Chowdhurya H., Alama F., Mainwaringb D. Aerodynamic study of ski jumping suits. 5th Asia-Pacific Congress on Sports Technology (APCST) [Electronic resource]. Available at: https://core.ac.uk/download/pdf/81220142.pdf (date of access: 16.05.2011).
  3. Md Abdullah Al Harun Khan Chowdhury. Aerodynamics of Sports Fabrics and Garments. A thesis submitted in fulfilment of the requirement for the degree of Doctor of Philosophy. School of Aerospace, Mechanical and Manufacturing Engineering. RMIT University, Melbourne, Australia, March, 2012. 195 p.
  4. Schmölzer B., Müller W. Individual flight styles in ski jumping: results obtained during Olympic Games competitions. Journal of biomechanics. 2004. no.38. ppp. 1055-1065.
  5. Virmavirta M., Kivekäs J., Komi P. Ski Jumping Takeoff in a Wind Tunnel With Skis. Journal of Applied Biomechanics. 2011. no. 27. pp. 375-379.
  6. Yamamoto K., Tsubokura M., Baleriola S., Onishi K. Effect of postural change on the aerodynamic characteristics during takeoff in ski jumping. 34th International Conference on Biomechanics in Sport. Tsukuba, Japan 18-22 July 2016 [Electronic resource]. Available at: http://lasbim.taiiku.tsukuba.ac.jp/isbs2016-program/papers/o1603276_effect of postural change on the aerodynamic characteristics during takeoff in ski jumping.pdf (date of access: 04.08.2019).