TITLE:
Aeolian Tone from a Semi-Circular Cylinder in a Stream
AUTHORS:
Takayuki Yamagata, Nozomi Saito, Nobuyuki Fujisawa
KEYWORDS:
Aeolian Tone, Semi-Circular Cylinder, Fluctuating Lift Force, Angle of Attack, Flow Induced Sound
JOURNAL NAME:
Journal of Flow Control, Measurement & Visualization,
Vol.4 No.1,
January
29,
2016
ABSTRACT: Aeolian tone from a semi-circular cylinder in a uniform flow is studied experimentally for various angles of attack. It is found that the peak sound spectrum of the Aeolian tone from the semi-circular cylinder is smaller than that from the circular cylinder and the lowest sound is observed around the zero angle of attack. This is due to the reduction in the fluctuating lift force on the semi-circular cylinder compared to that of the circular cylinder. This result suggests the validity of the analogy between the sound pressure level and the fluctuating lift force on a semi-circular cylinder in a stream. The flow visualization study also supports these results.