Study On the Drag of a Cylinder with Air Blowing in an Air Stream

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概要

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• It is well known that the value of a drag acting on a body in an air stream may change or be controlled with the blowing air from its surface. In this study, the change of the drag acting on the cylinder with and without blowing was studied. Three types of blowing were applied i. e. blowing on total surface, upstream half surface and downstream half surface of the cylinder. At first, calculation of the drag was made from momentum change between up and downstream of the body. When the blowing was given on the down stream half surface of the cylinder, the drag decreases slightly with an increase of blowing. The reason for the increase is because of a rise in pressure and a decrease in width of the recirculation zone. The measurement of karman street in the wake of a cylinder was also made. The value of drag calculated with the measured values of the vortex street showed good agreement with that calculated by the momentum theorem.

• 一般社団法人日本機械学会の論文

著者

• Adachi Tsutomu

  Osaka University

• Uematsu Tokio

  Osaka Electro-communication University

• TAKU Kiyomitsu

  Sanki Engineering Co.

• TANBARA Masakazu

  Nissan Motor Co.

関連論文

• Study On the Drag of a Cylinder with Air Blowing in an Air Stream

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