Aerodynamic study of time-trial helmets in cycling racing using CFD analysis.
J Biomech
; 67: 1-8, 2018 01 23.
Article
en En
| MEDLINE
| ID: mdl-29150346
The aerodynamic drag of three different time-trial cycling helmets was analyzed numerically for two different cyclist head positions. Computational Fluid Dynamics (CFD) methods were used to investigate the detailed airflow patterns around the cyclist for a constant velocity of 15â¯m/s without wind. The CFD simulations have focused on the aerodynamic drag effects in terms of wall shear stress maps and pressure coefficient distributions on the cyclist/helmet system. For a given head position, the helmet shape, by itself, obtained a weak effect on a cyclist's aerodynamic performance (<1.5%). However, by varying head position, a cyclist significantly influences aerodynamic performance; the maximum difference between both positions being about 6.4%. CFD results have also shown that both helmet shape and head position significantly influence drag forces, pressure and wall shear stress distributions on the whole cyclist's body due to the change in the near-wake behavior and in location of corresponding separation and attachment areas around the cyclist.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ciclismo
/
Hidrodinámica
/
Dispositivos de Protección de la Cabeza
Límite:
Humans
Idioma:
En
Revista:
J Biomech
Año:
2018
Tipo del documento:
Article
Pais de publicación:
Estados Unidos