Effect of wetted surface area on friction, pressure, wave and total drag of a kayak
Using theoretical principles, the components of drag (friction D F, pressure D PR and wave D W) of a single-seat kayak were analysed. The purpose was to examine the effect of changes in wetted surface area due to changes in kayaker`s weight and the relative contribution of D F, D PR and D W to the total passive drag as function of velocity. The total passive drag values were based on experimental data collected in a single-seat kayak. Three different kayaker simulated weights were tested - 65, 75 and 85 kg. D F was the drag component that contributed the greatest percentage (between 60 and 68% at 5.56 m/s the top velocity tested) to the total passive drag for all the velocities tested and simulated weights. D W was the most affected by the increase in kayaker`s simulated weight, mainly when comparing 65/75 to 85 kg. Results support the importance of a kayak design selection that minimises the kayak`s drag for the individual weight of the kayaker. Also, the results suggest that the path for better hydrodynamic kayak performance should seek changes that can reduce D F, D PR and D W with D F offering the most potential to reduce passive drag.
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Aiheet: | biomekaniikka analyysi nestedynamiikka kajakki testi |
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Aihealueet: | valmennusoppi tekniset ja luonnontieteet kestävyys urheilu |
DOI: | 10.1080/14763141.2017.1357748 |
Julkaisussa: | Sports Biomechanics |
Julkaistu: |
2018
|
Vuosikerta: | 17 |
Numero: | 4 |
Sivuja: | 453-461 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |