Results 261 to 270 of about 13,073 (314)

Vortex shedding in unsteady flow [PDF]

Journal of Wind Engineering and Industrial Aerodynamics, 1983
Abstract Previous experiments by other workers have shown that when a cylinder vibrates in a steady flow the frequency of the vortex shedding from the cylinder can synchronize with the frequency of the cylinder's vibration. As a result the shedding frequency remains constant over a range of flow velocities, and the oscillatory forces acting on the ...
F.H. Barnes, I. Grant
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Vortex Shedding in a Turbine Cascade

International Journal of Turbo and Jet Engines, 1998
Flow simulations have been performed to examine vortex shedding in a turbine cascasde. Four progressively finer grids were used, and it was found that a very fine grid is required to accurately capture the unsteady flow in the trailing edge region. The predominant shedding frequency in the simulations was in good agreement with the experimental result.
Douglas Sondak, Daniel Dorney
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Feedback Control of Karman Vortex Shedding

Journal of Applied Mechanics, 1996
A computational study of the feedback control of the magnitude of the lift in flow around a cylinder is presented. The uncontrolled flow exhibits an unsymmetric Karman vortex street and a periodic lift coefficient. The size of the oscillations in the lift is reduced through an active feedback control system.
Gunzburger, M. D., Lee, H. C.
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Vortex Shedding: A Review on Flat Plate

Fluid Dynamics, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Teimourian, Amir, Yazdi, Sina G., Hacisevki, Hasan   +2 more
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Computation of turbulent vortex shedding

Computational Mechanics, 2005
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Younis, B. A., Przulj, V. P.
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Vortex shedding-free strainers

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2011
The subject of the periodic vortex shedding behind bluff bodies, which exhibits oscillatory behaviour, is of direct relevance to many practical applications, e.g. pipelines and heat exchangers. Repetitive failures were occurring in associated piping components on the suction of a sales gas compressor. Available experimental investigations indicated the
Y Khulief, M A Habib, S A M Said, R Ben-Mansour, H M Badr, M Anis, A E Khalifa   +6 more
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The active control of vortex shedding

Journal of Fluids and Structures, 1989
This paper describes an active method of controlling vortex shedding from a circular cylinder at Reynolds number 400. The control was effected by an acoustic feedback of signals taken from hot-wires in the wake of the cylinder. The velocity fluctuation at the nominal vortex shedding frequency is reduced throughout the wake, in places by more than 30 ...
J.E. Ffowcs Williams, B.C. Zhao
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On the accurate calculation of vortex shedding

Physics of Fluids A: Fluid Dynamics, 1990
The issue of accuracy and convergence for numerical calculations in situations in which the exact solution of the Navier–Stokes equations (under the imposed initial and boundary conditions) is unstable is discussed. If one relies on roundoff error or truncation error (or the randomness of a stochastic scheme) in order to perturb the computed solution ...
Christopher R. Anderson, Claude Greengard, Leslie Greengard, Vladimir Rokhlin   +3 more
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On the mechanism of symmetric vortex shedding

Journal of Fluids and Structures, 2019
Abstract In this paper, we study the vortex-shedding mechanism of a square cylinder subjected to a mean flow with a superimposed pulsatile flow, under symmetric vortex shedding conditions. The near-body vortical events are interpreted in accordance with the two-dimensional vorticity transport equation, and the interactions between different vortical ...
Krishnan Hrisheekesh, Amit Agrawal, Atul Sharma, Mark C. Thompson, John Sheridan   +4 more
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Vortex shedding and the voice source

The Journal of the Acoustical Society of America, 2007
The voice source is primarily an acoustic dipole produced by the fluctuating drag on the vocal folds [Zhao, Zhang, Frankel et al., J. Acoust. Soc. Am. 112, 2134–2146 (2002)]. In this paper the unsteady drag is determined theoretically in terms of the vorticity shed from the vocal folds.
Michael S. Howe, Richard S. McGowan
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