248 単独翼のフラッタ発生速度に及ぼす各種パラメータの影響に関する研究

概要

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The flutter is a dangerous phenomenon bringing down the destruction of aerofoil, so the prediction of the flutter speed is strongly required. In this paper, the theoretical calculation for a two-dimensional flat-plate aerofoil was carried out by using the unsteady aerofoil theory and the wind tunnel experiments for the flat-plate aerofoil was also carried out to clarify the relationship between the flutter speed and various parameters such as the elastic axis position, the bending natural frequency and the torsional natural frequency of the aerofoil. The results are summarized as follows: (1) The flutter speed decreases with going the elastic axis position downstream. (2) The flutter speed falls as tortional natural frequencies become low. (3) If the bending (torsional) natural frequency becomes higher than the torsional (bending) natural frequency, the torsional (bending) natural frequency has little effect on the flutter speed.
一般社団法人日本機械学会の論文
2011-09-05