Masakazu Tatsuno et al 1998 Fluid Dyn. Res. 22 297 doi:10.1016/S0169-5983(97)00040-3
Masakazu Tatsuno1,2, Hajime Amamoto1 and Koji Ishi-i1
Show affiliationsThe effects of flow interference among three identical circular cylinders, which were arranged in an equidistant triangular cluster with their axes perpendicular to the uniform flow, were studied at various incidence angles to the uniform flow and at different spacing ratios. The static pressures around the circumference of each cylinder were measured individually and the drag and lift coefficients of each cylinder were determined at Reynolds number of 6.2 × 104 based on the diameter of a single cylinder. The effects of flow interference among the three cylinders are severe when the spacing ratios are small. When two cylinders arranged side by side are upstream of or behind the third one, the flow patterns are not symmetrical with respect to the uniform flow direction and the drag or lift coefficients of the two cylinders in the side-by-side arrangement are not always equal to each other at small spacing ratios. The inclination angles to the uniform flow strongly influence the drag and lift coefficients, the direction of force exerted on each cylinder and the flow patterns around the cylinders. The effects of interference among three cylinders become weak as the spacing ratios are increased.
Issue 5 (May 1998)
Received 26 May 1997, revised 23 June 1997, accepted for publication 31 July 1997
Masakazu Tatsuno et al 1998 Fluid Dyn. Res. 22 297
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