Abstract
This paper deals with the aerodynamic noise generated by a round bar bended into a circular arc shape in uniform air flow. The bend round bar has a curvature R and attack angle α. In the experiment, we investigated the effects of R or α on the aerodynamic sound generated by bend round bars. The results of the frequency analyses of the aerodynamic sounds show that the aeolian tones are generated by the bend round bar, when α is large, but that when α is small, although the aeolian tones are reduced, the broad band noise of lower frequencies are increased. In order to decrease aeolian tones, we find the appropriate attack angle α.
