一様流中の変形を伴う物体の後流構造と発生する流体音の関係

抄録

Recently, many studies have been performed to innovate heat cooling and power generation technologies by effectively using the self-excited vibration of the flag-like objective in a free stream. Therefore, the flow structure and characteristics around the flag in a free stream have been attracting attention and studied. On these backgrounds, an experimental study on the relation between the wake of the flag and the noise and vibration of the flag was performed. In the experiment, simultaneous measurements of the displacement, generated noise, and the velocity profiles of the flag were performed. Results showed that the vibration of the downstream edge of the flag which brought the distinct noise generation was caused by the strong upward or downward flow which occurs periodically in the wake of the flag.