Wearing a helmet in hot-humid climates is extremely uncomfortable due to excessive sweating. To enhance the evaporation of sweat alternative designs of the helmet are investigated. CFD simulations were performed in FLUENTTM to determine the velocity of air flow in the proposed helmet models. The head was approximated by a hemisphere and cylinder at the bottom. The presence of grooves enhanced remarkably the air flow velocities around the top of the head. Frontal and side impact simulations at different velocities up to 10m/s were performed with helmet and deformable head model in LSDYNATM. Pressure and stresses in the brain were investigated and were found not to change significantly due to the presence of grooves in the helmet. For the covering abstract see ITRD E141569.
Samenvatting