Computational and subjective assessment of ventilated helmet with venturi effect and backvent

For better understanding of effect of newly designed ventilated helmets on the cognitive performance and the willingness of a rider to wear helmets, subjective evaluation of the prototype of venturi helmet is done. Each set of trials required riders to ride with different types of helmets. Based on the results of numerical simulations of ventilation in helmets and responses from subjective human trials, a set of fluid dynamics and design guidelines is also proposed for the helmet manufacturing industries.