Flow Characteristics of a Bluff Body Cut From a Circular Cylinder

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  • S. Aiba
    Department of Mechanical Engineering, Akita Technical College, Akita 011, Japan
  • H. Watanabe
    Department of Mechanical Engineering, Akita Technical College, Akita 011, Japan

説明

<jats:p>This is a report on an investigation of the flow characteristics of a bluff body cut from a circular cylinder. The volume removed from the cylinder is equal to d/2(1 − cos θs), where d and θs are the diameter and the angular position (in the case of a circular cylinder, θs, = 0 deg), respectively. θs, ranged from 0 deg to 72.5 deg and Re (based on d and the upstream uniform flow velocity U∞) from 2.0 × 104 to 3.5 × 104. It is found that a singular flow around the cylinder occurs at around θs = 53 deg when Re > 2.5 × 104, and the base pressure coefficient (−Cpb,) and the drag coefficient CD take small values compared with those for otherθs.</jats:p>

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