F-0713 一様水流中の柔軟弾性表面を持つ円柱に発生する進行波の特性と発生メカニズム(J22-1 生体関連の熱・流体工学(1))(J22 生体関連の熱・流体工学)

概要

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It is important to understand the interaction between deformable skin surface of creatures and its surrounding flow field. We have carried out this study using various cylinder models having elasto-flexible surface to clarify the interaction. The deformation of the surface and the flow field around the model were observed using a laser light sheet visualization method. The visualization result showed that there were three different kinds of traveling waves generated on the surface of all cylinder models, namely, continuously-occurring wave, periodically-occurring wave, randomly-occurring wave at high-speed stream. Especially, periodically-occurring wave was observed to occur at every Karman vortex shedding from the cylinders. The experimental results indicated that frequency of the traveling wave was proportional to neary Re^<0.67>. The traveling velocities were nearly 60〜80% of the main flow velocities in their magnitude. In the case of the continuously-occurring wave pressure waveform in inner fluid had the same frequency as the traveling wave. In the periodically-occurring wave, the frequency was equal to that of Karman vortex shedding.
一般社団法人日本機械学会の論文
2001-08-22