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Axial Flow in a Vortex in Karman Vortex Street.
Journal of the Japan Society for Aeronautical and Space Sciences, 1996The vortex filaments in a Karman vortex street are usually not parallel to the axis of a circular cylinder perpendicular to a uniform flow in a low speed wind tunnel, but incline to the axis of the cylinder. The axial flow to the upstream direction in a vortex was observed by means of flow visualization in each vortex of the Karman vortex street.
Nobuyuki OHKURA +2 more
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Karman vortex street parametrization with image processing application
SPIE Proceedings, 2003The karman vortex street phenomenon is applied in the vortex flowmeter. Application of various methods of investigations is necessary in the course of getting increased knowledge of the phenomenon. Flow visualization being the leading method of aero- and hydrodynamic phenomena investigations enables qualitative evaluation in micro-scale.
Grzegorz Pankanin +2 more
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Modeling and Control of Karman Vortex Streets
1991One of the most important problems in hydrodynamics is the behaviour of low-dimensional dynamics in closed and open flows. Lorenz 1 and Ruelle & Takens 2 proposed that the dynamics of a hydrodynamic system at the onset of turbulence could be described by strange attractors and low-dimensional differential equations.
E. Roesch +3 more
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Elliptical-inertial instability of rotating Karman vortex streets
Physics of Fluids, 2005Clouds often reveal a small-scale vortex shedding in the wake of mountainous islands. Unlike the classical bidimensional Karman street, these observed vortex streets are affected by the earth’s rotation and vertical stratification of the atmosphere. These effects induce a selective destabilization of anticyclonic vorticity regions.
Stegner, A., Pichon, T., Beunier, M.
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Destabilization of the Karman vortex street by frequency-modulated excitation
Physics of Fluids A: Fluid Dynamics, 1991A two-dimensional cylinder is subjected to frequency-modulated excitation in the cross-stream direction. Transition from a locked-in response to a completely destabilized response can be attained by lowering the value of modulation frequency while all other parameters are maintained constant.
M. Nakano, D. Rockwell
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On the Impingement of von Karman Vortex Street on a Delta Wing
22nd Applied Aerodynamics Conference and Exhibit, 2004It is well known that aircraft undergoing high angle of attack excursions (e.g., the Cobra maneuver) may experience asymmetric forebody vortex shedding under certain conditions. The detachment of these vortices from the forebody is similar to that observed from von Karman vortex shedding from cylinders.
Ismael Heron, Roy Myose
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Frequency of the Karman Vortex Streets in Tube Banks
The Journal of the Royal Aeronautical Society, 1967In the note “Aerodynamically induced vibration in coolers”, by D. G. Mabey (pp 876-7, December 1965 Journal), the results of Grotz and Arnold concerning the frequency of the Karman vortex streets in tube banks, such as in heat exchangers, are mentioned, as is also the law of the linear relation between f(T—d)/V and (2T-L)/d, as found by Putnam, where f
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ON POSSIBLE WAYS OF DISTURBANCE PROPAGATION ALONG KARMAN VORTEX STREETS
TsAGI Science Journal, 2011exaly +2 more sources
Discrete vortex method simulation of Karman vortex street-edge interaction
2021231
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Spectral Element Calculation of a Von Karman Vortex Street
Fluids Engineering, 1996Abstract This paper presents results for the direct numerical simulation of unsteady two-dimensional incompressible flow past a circular cylinder at a Reynolds number of 140. Conforming and nonconforming formulations of the spectral element method have been employed to compare the grid resolution reqirements for the von Karman vortex ...
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