Effects of venting geometry on thermal comfort and aerodynamic efficiency of bicycle helmets

The thermal comfort and aerodynamic efficiency are becoming important design criteria for bicycle helmets. The characteristics of venting geometry, venting orientation and venting location play an important role in overall heat dissipation characteristics and aerodynamic drag. In order to design an optimal helmet for aerodynamic efficiency and thermal comfort, a comprehensive study is required. Therefore, the primary objective of this work was to study the thermal and aerodynamic efficiency as a function of venting geometry, location and orientation of a series of production helmets currently available in Australian market.