クロール時の泳者の腕周りの流れ場の可視化(J07-2 生物の運動機能/バイオミメティクスとバイオメカニクス/バイオロボティクスとバイオメカトロニクス(2),J07 生物の運動機能/バイオミメティクスとバイオメカニクス/バイオロボティクスとバイオメカトロニクス)

概要

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Purpose: Using PIV, we visualized the velocity field around swimmer's hand and analyzed the vorticity generated by hand. Methods: Experiments were carried out in a swimming flume. We used YAG laser sheet to illuminate the tracer particles around the swimmer's arm. The images were captured by a CCD camera and stored in a personal computer. We made the image map and the vector and vorticity map. Results: The larger and stronger swimmers make the vortex, the larger the momentum is generated around a hand. In S-shaped pull, we can detect the negative vorticity near a thumb in in-sweep phase, and the positive vorticity near a small finger in out-sweep phase. Conclusion: we succeeded the visualization around swimmer's arm for the first time. We clarified the unsteady flow field around the arm, and evaluated the force generated by the hand qualitatively.
社団法人日本機械学会の論文
2004-09-04