靴内換気量に関する実験的研究

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  • An experimental study of ventilation in a footwear

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<p>Air permeability is one of the important functions of footwear to control microclimate inside a shoe for keeping comfort. Focusing on running motion, swing phase should significantly affect ventilation of a shoe due to large velocity of foot. During the swing phase, foot posture and angle of attack (AoA) change at every moment. In this study, the relationships between AoA and ventilation in a footwear were investigated. To imitate the swing phase of running, a new experimental apparatus was built with a combination of a simple wind tunnel and a posture-changeable artificial foot. Ventilation in a footwear was obtained by tracer gas method. In the AoA range between 0 to 135 degree, ventilation in toe and instep area took minimum value at about 45 degree of AoA. Judging from extra Particle Image Velocimetry (PIV) measurement, ventilations in toe and instep area have positive correlation to wind velocity and gauge pressure near the measurement point.</p>

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