Effect of attack angle on flow around the adjacent circular and rectangular prism

An experimental investigation has been carried out to clarify the flow structure around adjacent circular and rectangular prisms. The measurements of hot-wire for Re= 4.1 x 10³, 9.0 10³ 1.5 10⁴, lift drag force Re = 1.0 in addition visualization experiments 2.3 have performed range 0° ≤ α 180°. bodies consist a cylinder having 9.5 mm diameter prism 6 10 cross-section attached from its short side all cases. hot wire measurement results showed that Strouhal number Reynolds independence 4.1x10³, 9.0x10³, 1.5x10⁴. Sudden peaks St coefficients are obtained similar reason is reattachment separated shear layer vicinity 60° 174°. For compared with bare cylinder, 40%, 25% reduction at 174°, respectively. show variations coefficient, strictly subjected attack angle.