Aerodynamic characteristics concerning cloth of sportswear

Abstract

Some sports wears are used at a top speed of about 25 m/s in a specific sport. This means that some sports wears are used in harsh environments. Therefore, reduction of air resistance is in great demand. A high-performance sportswear contributes to improvement of a record. This study is investigated the aerodynamic behavior of functional fabric on a cylinder model. A cylinder model imitates a trunk of a human body and arms by connecting a cylinder different in the diameter. Seams are imitated in this cylinder model. This fabric was tasted in a wind tunnel from 3 to 30 m/s. The wake of this fabric was visualized by the PIV measurement. The single cylinder showed drag crisis in Re =0.6～0.8×105. However, the Cylinder model didn't exhibit drag crisis. These results are correlated with Visualization of the wake. The arms of human body are important for studying aerodynamic characteristics of sportswear.