Effect of slenderness and attack-angle on cross-flow oscillation of a rectangular cylinder supported by cantilever in uniform flow

The cross-flow oscillation of a rectangular cylinder supported by a cantilever plate-spring system was investigated using a wind tunnel, in order to reveal the effect of attack angle fluctuation superimposed on cross-flow oscillation. Three kinds of support systems were tested in order to give a different phase-shift between attack angle and cylinder displacement. Three rectangular cylinders with the slenderness of 0.5, 1.0 and 2.0 were used to investigate effect of attack angle both on the Ka´rma´n vortex excitation and the galloping. The effect of attack angle fluctuation on oscillation behavior markedly differed among the three rectangular cylinders of different slenderness. When the slenderness was 0.5, attack angle fluctuation had no influence on the oscillation behavior of the cylinder. When the slenderness was 1.0 and 2.0, the oscillation behavior was quite different compared with pure cross-flow oscillation, depending on the support system and slenderness.

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Numerical Simulation of Flow-Induced Vibration of a Rectangular Cylinder

Volume 2: Symposia, Parts A, B, and C ◽

10.1115/fedsm2003-45623 ◽

2003 ◽

Author(s):

Atsushi Enya ◽

Atsushi Okajima

Keyword(s):

Bluff Body ◽

Cross Flow ◽

Uniform Flow ◽

Low Velocity ◽

Flow Induced Vibration ◽

Eddy Simulation ◽

Rectangular Cylinder ◽

Flow Induced Vibrations ◽

High Reynolds ◽

Elastically Supported

It is important for industrial purposes to predict flow-induced vibration of a bluff body elastically supported in an uniform flow. In this paper, the free oscillation of a rectangular cylinder with two-degree of freedom in the streamwise (in-line) and cross-flow (transverse) directions in a uniform flow, was computed by the Large Eddy Simulation (LES) method at high Reynolds number of 2.2 × 104. The Smagorinsky model was used as a subgrid scale (SGS) model. The main objectives of this work were to predict and estimate characteristics of flows around a free-oscillating cylinder. The present computations successfully reproduce various types of flow-induced vibrations of a free-oscillating rectangular cylinder as found by experiments; in-line oscillation, eddy-excitation and low-velocity galloping.

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1307 Influence of effect of wake body on the cross-flow oscillation of a square cylinder in uniform flow

The Proceedings of Conference of Hokuriku-Shinetsu Branch ◽

10.1299/jsmehs.2009.46.509 ◽

2009 ◽

Vol 2009.46 (0) ◽

pp. 509-510

Author(s):

Takeshi HAGINOYA ◽

Yusuke KAWABATA ◽

Mizuyasu KOIDE ◽

Tsutomu TAKAHASHI ◽

Masataka SHIRAKASHI

Keyword(s):

Cross Flow ◽

Uniform Flow ◽

Flow Oscillation ◽

Square Cylinder ◽

The Cross

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The Vibration Response of a Cantilevered Rectangular Cylinder in Cross-Flow Oscillation

Journal of Fluids Engineering ◽

10.1115/1.1792255 ◽

2004 ◽

Vol 126 (5) ◽

pp. 884-887 ◽

Cited By ~ 1

Author(s):

Mizuyasu Koide ◽

Yuuki Kubo ◽

Tsutomu Takahashi ◽

La´szlo´ Baranyi ◽

Masataka Shirakashi

Keyword(s):

Cross Flow ◽

Vibration Response ◽

Flow Oscillation ◽

Rectangular Cylinder

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A cross-flow turbine turned with non-uniform flow velocity on the cooling tower

10.1063/1.5098224 ◽

2019 ◽

Author(s):

Budi Santoso ◽

Dominicus Danardono Dwi Prija Tjahjana ◽

Genta Praha Picaso

Keyword(s):

Flow Velocity ◽

Cooling Tower ◽

Cross Flow ◽

Uniform Flow

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Simulation of a Rectangular Cylinder in Cross Flow in a Microchannel Using Information Preservation (IP) Method

Volume 11: Micro and Nano Systems, Parts A and B ◽

10.1115/imece2007-42241 ◽

2007 ◽

Author(s):

U. Kursun ◽

J. S. Kapat

Keyword(s):

Gas Flow ◽

Cross Flow ◽

Direct Simulation Monte Carlo ◽

Reynolds Numbers ◽

Low Reynolds Numbers ◽

Information Preservation ◽

Rectangular Cylinder ◽

Characteristic Theory ◽

Simulation Monte Carlo ◽

Pressure Boundary Conditions

A numerical simulation is performed to study the characteristics of the gas flow over a constant temperature rectangular cylinder in a cross flow in a micro channel. The non-isothermal Information Preservation (IP) method is employed to eliminate the statistical scatter of Direct Simulation Monte Carlo (DSMC) at low Reynolds numbers. Pressure boundary conditions based on the characteristic theory are implemented in the algorithm. The simulation results are compared with the references available in the literature. This study will form a base for our future particle-atomistic hybrid computations.

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In-Flow Oscillation of Circular Cylinders in Cross-Flow

Volume 4: Fluid-Structure Interaction ◽

10.1115/pvp2007-26103 ◽

2007 ◽

Author(s):

Tomomichi Nakamura ◽

Hiroshi Haruguchi ◽

Hiroyuki Nakajima ◽

Toyohiro Sawada ◽

Kozo Sugiyama

Keyword(s):

High Speed ◽

Flow Direction ◽

Vortex Motion ◽

Cross Flow ◽

Video Camera ◽

Circular Cylinders ◽

Flow Oscillation ◽

Single Cylinder ◽

Digital Video Camera ◽

Flow Oscillations

The importance of the in-flow oscillation of a single cylinder in cross-flow has been highlighted since an accident in a FBR-type reactor. In-flow oscillations have also been observed in tube arrays. This report is an experimental study on this phenomenon using totally nine cylinders in a water tunnel. Six cases, one single cylinder, two & three cylinders in parallel & in tandem, and a nine cylinder bundle, are examined. Every cylinder can move only in in-flow direction. The motion of cylinders is measured by the strain gages and by a high-speed digital video camera. The results are compared with the visualized vortex motion.

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