Analysis of Flow-Induced Vibrations in Piping Systems and Circular Cylindrical Structures.

Sadaoka, Noriyuki; Kobashi, Keiji; Umegaki, Kikuo

doi:10.1299/jsmeb.41.221

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…On updating the mesh with moving boundary, re-generation of the mesh with respect to some specified geometric parameters is popularly adopted [1][2][3]; however, difficulty is encountered when the boundary was not part of a rigid body. A dynamic mesh method [4] with network of artificial springs for the mesh has been developed for the large-scale fluid-structure interactions.…”

Section: Introductionmentioning

confidence: 99%

Deforming mesh with unsteady turbulence model for fluid-structure interaction

Yeh¹

2006

WIT Transactions on Engineering Sciences, Vol 52

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By taking the mesh of the fluid domain as a virtual solid and using the explicit integration scheme to solve the solid dynamics, a deforming mesh method is proposed for the simulation of fluid-structure interaction. The deforming mesh method with an unsteady turbulence model has been implemented into a finite element code derived from slightly compressible flow formulation and an explicit integration scheme. Due to the explicit integration scheme used for the dynamics of both deforming mesh and fluid flow, it is easy to perform parallel computation for a large-scale fluid-structure interaction problem. After the validation of this approach on the flow induced vibration of the flow past a circular cylinder, the unsteady fluid-structure interaction of a heat exchangertube row in crossflow is demonstrated.

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Section: Introductionmentioning

confidence: 99%

Deforming mesh with unsteady turbulence model for fluid-structure interaction

Yeh¹

2006

WIT Transactions on Engineering Sciences, Vol 52

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“…Kassera and Strohmeier (1997) applied the finite-volume method to simulate the flow-induced vibration of full flexible tube bundles, with different turbulence models for the turbulent nature of the flow. Sadaoka et al (1998) numerically studied the occurrence of fluid elastic instability for 3×3 square cylinder arrays. Schroder and Gelbe (1999) simulated the flow-induced vibration of tube bundles with the CFD program, STAR-CD, in combination with a coupled solver for the differential equations of parallel vibrating cylinders.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on fluid elastic vibrations of multiple cylinders in cross flow

Lin

2005

Journal of the Chinese Institute of Engineers

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The flow-induced vibrations of cylinder arrays subjected to cross flow are studied numerically. Multiple cylinders, two to seven identical cylinders, in a rotated triangular array are investigated, with an emphasis on neighborhood-cylinder effects on the onset of fluid elastic vibrations for a monitored cylinder. The instantaneous velocity and pressure distributions of the fluid flow, and the fluid forces on cylinder surfaces are computed numerically. The displacements of the cylinders, due to the fluid forces, are then calculated as a function of time, to describe the cylinder motions in the flow. From the amplitude responses of the cylinders, it is illustrated that fluid elastic vibrations with significant amplitude occur in multiple cylinders as the freestream velocity goes beyond a critical value, while a single cylinder can only exhibit vortex-induced vibrations with relatively small amplitude in a narrow velocity range. Beyond the critical velocity, the cylinders vibrate in elliptical orbits. Amplitude diagrams are used to determine the critical velocity for the onset of the fluid elastic vibrations. It is shown that with more upstream cylinders, the critical velocity of the monitored cylinder decreases, implying that the cylinder becomes more fluid elastically unstable. However, the critical velocity of the cylinder does not change as more adjacent cylinders are added downstream.

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Simulation of Flow Induced Vibrations of Tube Bundle in Cross Flow

Lin

2001

J. mech.

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The flow-induced vibration of tubes in a rotated triangular array subject to cross flow is simulated numerically. In the study, the flow field around the tube bundle is computed by solving the continuity and Navier-Stokes equations with assumption of constant fluid properties, and the kε-model for turbulent Reynolds stress. With the flow field known, the fluid forces on the tube surfaces can be calculated, and then the displacement of each tube due to the fluid force can be evaluated. Iteration is needed to obtain the dynamic response of the tube structure in the fluid flow. The parameters in the study are inlet velocity of the cross flow and properties of the tube bundle including natural frequency, damping factor, and mass. Based on the tube response, the critical flow conditions of tube vibration are determined for varying mass damping. Once tube vibrations occur, it is shown that the vibrations of the tubes in the second and fourth tube rows are significant as compared to other tubes. The orbits of the tube vibration look like an ellipse with major axis in the cross-stream direction, implying large lift force on the tubes. The dominant frequency in the spectrum of lift coefficients of the tubes is the same as the natural frequency, and the corresponding amplitude is increased with increasing the inlet velocity. The calculated data predicted for the critical reduced velocity agrees well with the data by Kassera and Strohmeier [17].

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Analysis of Flow-Induced Vibrations in Piping Systems and Circular Cylindrical Structures.

Cited by 3 publications

References 4 publications

Deforming mesh with unsteady turbulence model for fluid-structure interaction

Deforming mesh with unsteady turbulence model for fluid-structure interaction

A numerical study on fluid elastic vibrations of multiple cylinders in cross flow

Simulation of Flow Induced Vibrations of Tube Bundle in Cross Flow

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