Aerodynamics of an isolated ski jumping ski
Deutscher übersetzter Titel: | Aerodynamik eines isolierten Skisprung-Skis |
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Autor: | Virmavirta, Mikko; Kivekäs, Juha |
Erschienen in: | Sports engineering |
Veröffentlicht: | 22 (2019), 1, 22:8 - S. 1-6, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 1369-7072, 1460-2687 |
DOI: | 10.1007/s12283-019-0298-1 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201907005196 |
Quelle: | BISp |
Abstract des Autors
A single isolated ski was suspended from a six-component wind tunnel balance and three angles, the angle of attack, the yaw angle and the edge angle were adjustable during the test. Increasing yaw angle from 0 to 15° increased the lift coefficient CL from 0.42 to 0.90 at edge angle 0° and from 0.70 to 0.87 at edge angle 10°, respectively. Increasing yaw angle also increased the sensitivity of the ski to changes in edge angle, i.e., increasing the edge angle (20°–45°) decreased the CL and the ratio C2L/CD with large yaw angles. However, to maximize the lift-to-drag ratio with a typical angle of attack of 30° in ski jumping, it may be reasonable to have an edge angle of 5°–10° on skis as the ratio C2L/CD increased from 1.24 to 1.35 when edge angle increased from 0° to 10°.