Takizawa, N., Okada, N. and Iwasaki, A. (1985) Wind-Tunnel Investigation of the Pressure Distribution and Deduced Characteristics of Semi-Circular Cylinder in the Vicinity of Critical Reynolds Number. Technical Report of National Aerospace Laboratory, 871, 1-44. (In Japanese)

has been cited by the following article:

• TITLE: Sound Source Measurement of a Semi-Circular Cylinder in a Uniform Flow by Particle Image Velocimetry

  AUTHORS: Yasuyuki Oguma, Nobuyuki Fujisawa

  KEYWORDS: Aerodynamic Noise, Sound Source, Semi-Circular Cylinder, Vortex Sound Theory, Particle Image Velocimetry

  JOURNAL NAME: Journal of Flow Control, Measurement & Visualization, Vol.4 No.4, October 20, 2016

  ABSTRACT: In this paper, the measurement of an aerodynamic sound source for a semi-circular cylinder in a uniform flow is described using Particle Image Velocimetry (PIV). This experimental technique is based on vortex sound theory, where the time derivative of vorticity is evaluated with the aid of two sets of standard PIV systems. The experimental results indicate that the sound source for the semi-circular cylinder is located around the shear layer near the edge of the semi-circular cylinder. The sound source intensity and the area are reduced in the semi-circular cylinder compared with those of a circular cylinder. This result indicates that the aerodynamic sound of the semi- circular cylinder is smaller than that of the circular cylinder, which supports the microphone measurement result.