Vortex-induced vibration (VIV) of a circular cylinder in combined steady and oscillatory flow

Zhao, Ming; Kaja, Kalyani; Xiang, Yang; Yan, Guirong

doi:10.1016/j.oceaneng.2013.08.006

Cited by 51 publications

(8 citation statements)

References 32 publications

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“…The range of C L for the smooth cylinder varied between 0.073-0.110 while the fouled cylinder has recorded lift coefficients ranging between 0.366-0.385, which indicates that the surface roughness has significantly influenced the values of lift coefficients. The frequency of the lift force on a circular cylinder is consistent with the vortex shedding frequency, and the frequency of the drag force is double that of vortex shedding [9]. The range of drag and lift coefficients are in good agreement with the findings published earlier by [12][13].…”

Section: Drag and Lift Coefficientssupporting

confidence: 89%

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Vortex-Induced Vibration Tests of a Marine Growth Wrapped Cylinder at Subcritical Reynolds Number

2017

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Abstract. Vortex Induced Vibrations (VIV) may cause great damage to deep water risers. Estimation of accurate hydrodynamic coefficients and response amplitudes for fouled tubular cylinders subjected to VIVs is a complex task. This paper presents the results of an extensive experimental investigation on in-line and cross-flow forces acting on cylinders wrapped with marine growth, subjected to current at Subcritical Reynolds Number. The drag and lift force coefficients have been determined through the use of the Fast Fourier Analysis methods. The different tests were conducted in the offshore engineering laboratory at Universiti Teknologi PETRONAS (UTP), Malaysia. In this study, a cylinder with outer diameter Do = 27 mm, fixed at top as cantilever beam was used. The in-line and cross-flow forces were measured using VIV Force Totaller (VIVFT). VIVFT is a two degree of freedom (2DOF) forces sensor developed by UTP to measure the VIV forces. The tests were conducted for current velocity varied between 0.118 to 0.59 m/s. The test results suggest that the cylinder wrapped with marine growth has shown an overall increase in drag and inertia coefficients as well as on response amplitudes.

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Section: Drag and Lift Coefficientssupporting

confidence: 89%

“…The reader can also refer to [9][10] for further study on VIVs. However, the effects of marine growth and surface roughness on VIV considering the Malaysian water is not existing.…”

Section: Introductionmentioning

confidence: 99%

Vortex-Induced Vibration Tests of a Marine Growth Wrapped Cylinder at Subcritical Reynolds Number

2017

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“…In this way, the value determines the sinusoidal oscillatory flow characteristics and hence the hydrodynamics forces generated by vortices around the cylinder. When is small enough, the cylinder`s surface boundary-layer is laminar and two-dimensional, but as the increases it will become unstable and three-dimensional [10].…”

Section: Introductionmentioning

confidence: 99%

Numerical based approach for predicting the response of flexible risers under oscillatory flows at Low Re and KC numbers

Valencia-Cardenas

Riveros-Jerez

2019

Sci. tech

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La predicción de respuesta en tuberías verticales flexibles se basa en modelos semiempíricos limitados por escasez de datos experimentales para modelados particulares. Este artículo presenta un enfoque numérico para predecir la respuesta de tuberías verticales flexibles en flujos oscilatorios. Se implementa un grado de libertad en un sistema de masa-resorte amortiguado, con la masa habilitada para moverse en la dirección transversal al flujo. Las ecuaciones de Navier-Stokes son discretizadas empleando el Método de Volúmenes Finitos. Los patrones de flujo en cada régimen son analizados en períodos de oscilación extensos. Se emplea un modelo bidimensional simulado en OpenFOAM. Se analiza el comportamiento del flujo, fuerzas hidrodinámicas y frecuencias para los valores de Reynolds entre 40 y 1000 utilizando 𝑲𝑪 𝟕, 𝟗. Para Reynolds, inferiores a 300, el comportamiento del modelo está de acuerdo con la literatura. Para valores de Reynolds 300 o más, algunas discrepancias aparecen en la dinámica del sistema. Los resultados numéricos obtenidos apartir del enfoque numérico propuesto concuerdan con los datos experimentales recopilados en un modelo de tubería vertical flexible

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“…Huang et al [32] studied a vertical riser VIV under the influence of sheared current by a numerical method and conducted comparisons with published experimental data. Zhao et al [33] studied the VIV in combined steady and oscillatory flow by solving the two-dimensional Reynolds-averaged Navier-Stokes equations. The same scholar also investigated the effects of flow ratio on cylinder response.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the vortex-induced vibration of marine risers under middle flow

Mao¹,

Cai²,

Yang³

et al. 2018

J. vibroeng.

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A considerable number of studies for vortex induced vibration (VIV) under uniform flow have been performed. However, investigation of VIV under middle flow is scarce. An experiment for VIV under middle flow was conducted in a deep-water offshore basin. Various measurements were obtained by the fiber Bragg grating strain sensors placed on the riser, and VIV under the effect of middle flow with was investigated. Results show that the riser vibrates at different order natural frequencies along the water depth in the CF and IL directions appearing as the multi-frequencies under middle flow. The variation vortex shedding frequencies along the riser under middle flow may generate different wake modes and vibration modals as the corresponding vortex shedding frequencies approach the riser natural frequencies. The dominant vibration frequency of the entire riser is consistent, and determined by high order natural frequency and the corresponding closing vortex shedding frequencies under the middle flow. Meanwhile, the vibration modal under middle flow appears multi-modals and other lower modal have effect on riser vibration. The VIV mechanism under middle flow possesses some aspects similar to those of uniform flow and several unique features.

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Vortex-induced vibration (VIV) of a circular cylinder in combined steady and oscillatory flow

Cited by 51 publications

References 32 publications

Vortex-Induced Vibration Tests of a Marine Growth Wrapped Cylinder at Subcritical Reynolds Number

Vortex-Induced Vibration Tests of a Marine Growth Wrapped Cylinder at Subcritical Reynolds Number

Numerical based approach for predicting the response of flexible risers under oscillatory flows at Low Re and KC numbers

Experimental study of the vortex-induced vibration of marine risers under middle flow

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