Effect of the Secondary Flow on Karman Vortex Shedding from a Yawed Cylinder

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概要

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• The Ka^^'ma^^'m vortex shedding from a circular cylinder with a yaw angle in a uniform flow was investigated using a wind tunnel. The yaw angle made the vortex shedding irregular and its frequency low. In addition, an intense secondary flow along the cylinder generatrix in the wake just behind the cylinder was induce by the yawing. When a pair of parallel plates were placed parallel to the free flow behind the cylinder in order to cut off the secondary flow, the vortex shedding in the area between the plates became regular and the frequency returned to the value for a normal one. The vortex shedding was more regular when the distance between the plates was made smaller, whereas the highest frequency was attained when the distance was 1〜1.6 times the cylinder diameter. It is concluded that the depression of the vortex shedding frequency by the yawing is attributed to the secondary flow behind the cylinder.

• 一般社団法人日本機械学会の論文

著者

• Wakiya Shoichi

  Technological University Of Nagaoka

• SHlRAKASHI Masataka

  Technological University of Nagaoka

• HASEGAWA Atsushi

  Nissan Motor Co. Ltd.

関連論文

• Vortex Excited Oscillation of a Circular Cylinder in a Uniform Flow
• Effect of the Secondary Flow on Karman Vortex Shedding from a Yawed Cylinder
• Analysis of Turbulent Structure of an impulsively Started Jet by Applying Image Processing
• Effect of Plate Wall above a Pipe Inlet on the Entry Flow of Viscoelastic Fluids
• Structure of Karman Vortex Shedding from a Yawed Cylinder in a Uniform Flow : Series B : Fluid Engineering, Heat Transfer, Combustion, Power, Thermophysical Properties

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