Bicycle Helmets—Are Low Drag and Efficient Cooling Mutually Exclusive?

Proceedings

Fitzgerald, Shaun¹ 

关键词: cycling aerodynamics;    thermal comfort;    bicycle helmets;   

DOI  :  10.3390/proceedings2060212

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

An aerodynamic study was conducted on eleven high-end ‘aero-road’ helmets with the aim of determining whether a helmet can simultaneously have low drag and efficient cooling. The aerodynamic drag of each helmet was measured using a custom-built cycling manikin at a velocity of 40 km/h with a yaw angle range of 0° to ±25° and at velocities of 50 and 58 km/h at 0° yaw. Thermal testing of the cooling abilities of each helmet was conducted with a custom-built heated mannequin headform, which incorporated 36 thermocouples embedded within its surface. Contour plots of the temperature distributions over the head were created together with images obtained by a thermal camera. The results demonstrate that all the aero-road helmets are generally as cool as each other, however, there can be significant differences in the aerodynamic drag.

【 授权许可】

CC BY