Flow-induced vibration of a radial gate at various opening heights

Lee, Seung Oh; Seong, Hoje; Kang, Jun Won

doi:10.1080/19942060.2018.1479662

Cited by 9 publications

(4 citation statements)

References 33 publications

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“…It is caused by the split and reattachment of the flow of water around the radial gate and by the resulting unstable flow under the gate [42,43]. Radial gates of the Japanese Wachi Dam and the US Folsom Dam were destroyed due to vortex-induced vibrations generated by the partially opened gates in 1967 and 1995, respectively [44].…”

Section: Analysis Results and Discussion Of Vibration Effectmentioning

confidence: 99%

Modelling of Flow Patterns over Spillway with CFD (Case Study: Haditha Dam in Iraq)

Almawla¹,

Kamel²,

Lateef³

2021

IJDNE

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Spillways are designing to release surplus water over a volume of storage. The excess water flows from the top of the reservoir and is carried back to the river by a spillway. Many radial gates were destroyed under hydrodynamic load. Radial gate connectors are susceptible to fatigue failure due to excessive vibration; therefore, gate vibration during operation must be investigated to confirm safe operation at the design water pressure. Several studies were carried out to analyse and simulation of flow over the spillway. In this article, the flow pattern over the Haditha dam spillway has been simulated using computational fluid dynamics (CFD). The numerical model was performed using Ansys Fluent 2020 R1 to simulate the flow properties; determination of cavitation damage at three discharges corresponding in the design of Haditha dam are 4700, 7140, and 7900 m3/s. In addition to finding the effect of gate vibration under dynamic water loads. The Realisable k-ɛ turbulence model was utilised with the volume of fluid (VOF) model to simulate the interaction between air and water phases. The validation of the numerical model was achieved by comparing it with a physical model. The physical model of the Haditha Dam spillway was made from iron with a scale of 1:110. It has been designed and constructed in a hydraulic laboratory according to the modelling principle of the hydraulic structure. The results showed that a high agreement between the physical and numerical model and the k-ɛ turbulence model could simulate the Haditha dam spillway with low cost and few times. The cavitation damage may occur at the region start at the end of the arching spillway to stretches downstream, and there is no damage of gate vibration under dynamic water load.

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Section: Analysis Results and Discussion Of Vibration Effectmentioning

confidence: 99%

Modelling of Flow Patterns over Spillway with CFD (Case Study: Haditha Dam in Iraq)

Almawla¹,

Kamel²,

Lateef³

2021

IJDNE

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“…Markovic et al [24] came up with a measure to effectively suppress hydrodynamic loads through placing a penetrating orifice at the gate bottom. Lee et al [25] modified the shape of the curved gate bottom and added a guide plate to stabilize the flow. When the gate opening height is 0.08 m, the vibration reduction can reach 75%.…”

Section: Flow Field Distributionmentioning

confidence: 99%

Holding Force and Vertical Vibration of Emergency Gate in the Closing Process: Physical and Numerical Modelling

Wang

Liu

2021

Applied Sciences

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A two-dimensional unsteady fluid–structure interaction numerical model was established, based on the physical model test, to investigate the influence of vertical vibration on the holding force of an emergency gate in the closing process. Gate motion was controlled by the user-defined function in Fluent. Attention was paid to the relationship between the vertical vibration, hydrodynamic loads and flow discharge. The experiment results show that holding force has three typical forms in the closing process and it is related to the service gate height. The numerical model can reflect the gate vertical vibration and the gate-closing displacement in the form of steps. Gate vertical vibration in the closing process is a motion-induced vibration caused by gate active falling. Moreover, the transition from full-flow to open-flow behind the emergency gate has a great influence on the gate vertical vibration. With a small gate opening, gate vertical vibration makes the flow discharge fluctuation increase. Furthermore, flow discharge has an influence on the gate body loads, which is mainly concentrated in the upstream plate and gate bottom. Finally, the lift force coefficient at the gate bottom is different from the standard and is mainly controlled by the outflow boundary condition. The simulation result is in good agreement with the experiment and the relative error meets engineering requirements, suggesting that the numerical model can successfully simulate the gate fluid–structure interaction and reproduce the characteristics of physical quantities in the closing process.

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“…To date, many scholars have investigated the fluid-induced vibration (FIV) of SRGs through prototype tests [3], numerical structural calculations [4,5], hydroelastic modeling experiments [6], and principle analyses [7,8]. The analyses showed that the supporting arms were the weakest component of the SRG, which could finally lead to the failure of the gate.…”

Section: Introductionmentioning

confidence: 99%

Chaotic Characteristic Analysis of Spillway Radial Gate Vibration under Discharge Excitation

Lu,

Liu,

Zhang

et al. 2023

Applied Sciences

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This paper aims to assess the nonlinear vibration of a radial gate induced by flood discharge; the measured acceleration response data of a spillway radial gate are analyzed using the chaos theory. The results show that the vibration responses of the gate at three opening heights present clear chaotic characteristics, and the chaotic characteristics of the lower main beam point are greater than other points. Moreover, the y-direction (vertical) correlation dimensions of the three measuring points on the supporting arm are larger than those of the x-direction (axial) and z-direction (lateral). The vertical vibration of the supporting arm is more complex and presents more uncertainties, which should be paid attention to in the literature. Under three different gate opening heights, the maximum Lyapunov exponent of each measuring point ranges from 0.0246 to 0.0681. In addition, the flow fluctuation load is the main excitation source of the gate vibration chaotic characteristics.

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Flow-induced vibration of a radial gate at various opening heights

Cited by 9 publications

References 33 publications

Modelling of Flow Patterns over Spillway with CFD (Case Study: Haditha Dam in Iraq)

Modelling of Flow Patterns over Spillway with CFD (Case Study: Haditha Dam in Iraq)

Holding Force and Vertical Vibration of Emergency Gate in the Closing Process: Physical and Numerical Modelling

Chaotic Characteristic Analysis of Spillway Radial Gate Vibration under Discharge Excitation

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