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- W1437686908 abstract "Abstract — The interaction between wakes of bluff body and airfoil have profound influences on system performance in many industrial applications, e.g., turbo-machinery and cooling fan. The present work investigates the effect of configuration include; airfoil’s angle of attack, transverse and inline spacing of the models, on frequency behavior of the cylinder’s near-wake. The experiments carried on under subcritical flow regime, using the hot-wire anemometry (HWA). The relationship between the Strouhal numbers and arrangements provide an insight into the global physical processes of wake interaction and vortex shedding. Keywords — Airfoil, Cylinder, Strouhal, Wake interaction I. I NTRODUCTION ERODYNAMIC interference between two closely separated structures give rise to flow separation, reattachment, vortex shedding, recirculation and quasi-periodic vortices. In this situation, interactions between the shear layers, wakes, and Karman vortex shedding of the structures have profound influences on system performance. Several practical configurations of Slender and bluff bodies can be found in groups with close proximity, for example turbo machineries, cooling systems, offshore structures and screens, in both air and water flow. Since, wake flows at a sufficiently large Reynolds number give rise to periodic shedding of vortices in the familiar von Karman Vortex Street; an important subject of research about near-wake is unsteady flow in this region. a dominant frequency of alternating vortices formation, usually expressed in terms of the dimensionless Strouhal number S=fL/U" @default.
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- W1437686908 date "2011-11-26" @default.
- W1437686908 modified "2023-09-27" @default.
- W1437686908 title "Experimental Study of Frequency Behavior for a Circular Cylinder behind an Airfoil" @default.
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