水中で正弦的に振動するだ円柱の流体反力

概要

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The hydrodynamic forces generated by interaction between water and an elliptic cylinder have been investigated experimentally. Five elliptic cylinder models of 12, 20, 30, 60 and 120 mm width, 60 mm height and 200 mm span were used. Period parameters ranging from 0.2 to 3.2 were covered in the investigation. The hydrodynamic forces on a circular cylinder, square cylinder and diagonal square cylinder reported by the present authors depended on the period parameter but not on the Reynolds number, and on the elliptic cylinder in the previous experiments was the same, therefore the experiments were made at the constant frequency of 2 Hz. The results are as follows : the correlation between the hydrodynamic force coefficients and the period parameters are explained, the correlations between the phase difference of the forces and the cylinder acceleration, and the force coefficient for all models are the same at the phase difference angles less than 45 deg. and the value of the maximum phase difference angle is approximately 62 deg.
一般社団法人日本機械学会の論文
1995-06-25