Abstract
The paper reviews the transverse curvature effect on the friction force on and the leading-edge flow around a cylinder subjected to axial flow. Skin friction coefficient (Cf) on the cylinder surface could be predominant functions of Reynolds number (Rea, based on cylinder radius a), transverse curvature (a+, normalized by friction velocity Uτ), and boundary-layer thickness ratio (δ/a). The relationships between Cf, Rea, a+, and δ/a are analyzed, established, and presented in the form of empirical formulations. The Cf at Rea ≤ 2 × 103 is mainly dependent on δ/a while that at Rea > 2 × 103 is largely contingent on Rea. The gaps of research into the axial flow cylinder are pointed out, namely, the literature lack the experimental study on large transverse curvature (small a+).
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