F-1208 螺旋型スクリューの推進特性(J27-2 バイオメカトロニクス・バイオロボットの要素技術・理論とシステム化技術(2))(J27 バイオメカトロニクス・バイオロボットの要素技術・理論とシステム化技術)

概要

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In the present study, the propulsive force of a rotating helical screw propeller is measured by using a floating scale. A drag coefficient (C_D) for a small segment of the screw is defined and is obtained from the experimental data at high Reynolds number (Re〜100) in water and at low Reynolds number (Re〜0.1) in glycerine. The C_D is roughly close to that of a circular cylinder, although the former is smaller than the latter because of flow interaction around the helix. At low Reynolds number, a boundary element analysis is also performed and the the numerical result approximates to the experimental one.
2001-08-22