Fluid-structure interaction in straight pipelines with different anchoring conditions

Ferràs, David; Manso, Pedro; Schleiss, Anton; Covas, Dídia

doi:10.1016/j.jsv.2017.01.047

Cited by 46 publications

(19 citation statements)

References 21 publications

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“…When the inlet or outlet is connected rigidly, continuity equations of axial, lateral, and bending directions are as follows [31] At the elbow of the pipeline, the coupling is treated as a boundary condition [28] by ignoring the local head loss. The pressure balance relationship at both ends of the elbow junction can be expressed as [29] P 1 = P 2 (16) By ignoring the flow separation and considering the continuity of the water column, the equilibrium equation of flow velocity and the velocity on the wall can be computed as…”

Section: Outlet and Inlet Boundarymentioning

confidence: 99%

Fluid-Structure Interaction Response of a Water Conveyance System with a Surge Chamber during Water Hammer

Guo

Zhou

et al. 2020

Water

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Fluid-structure interaction (FSI) is a frequent and unstable inherent phenomenon in water conveyance systems. Especially in a system with a surge chamber, valve closing and the subsequent water level oscillation in the surge chamber are the excitation source of the hydraulic transient process. Water-hammer-induced FSI has not been considered in preceding research, and the results without FSI justify further investigations. In this study, an FSI eight-equation model is presented to capture its influence. Both the elbow pipe and surge chamber are treated as boundary conditions, and solved using the finite volume method (FVM). After verifying the feasibility of using FVM to solve FSI, friction, Poisson, and junction couplings are discussed in detail to separately reveal the influence of a surge chamber, tow elbows, and a valve on FSI. Results indicated that the major mechanisms of coupling are junction coupling and Poisson coupling. The former occurs in the surge chamber and elbows. Meanwhile, a stronger pressure pulsation is produced at the valve, resulting in a more complex FSI response in the water conveyance system. Poisson coupling and junction coupling are the main factors contributing to a large amount of local transilience emerging on the dynamic pressure curves. Moreover, frictional coupling leads to the lower amplitudes of transilience. These results indicate that the transilience is induced by the water hammer-structure interaction and plays important roles in the orifice optimization in the surge chamber.Keywords: fluid-structure interaction; pipe flow; finite volume method; water hammer; transient flow IntroductionPipes conveying fluid are prevalent in many fields, including marine, civil engineering, nuclear power industries, petroleum, and water conservancy systems in daily life [1]. As an inherent phenomenon, fluid-structure interaction (FSI) always occurs in water conveyance pipelines [2][3][4]. Because of the existence of FSI, those pipes with few supports or thin walls show poor robustness, where the FSI of pipes is enhanced [5]. Therefore, the FSI responses must be considered when analyzing the characteristics of water conveyance systems [6]. The types of coupling that occur between the pipeline and fluid mainly include friction coupling, Poisson coupling, and junction coupling, among which the former two coupling take place throughout the whole pipeline. However, the last one only happens locally in pipes, including in elbows, branches, valves, boundaries, and variable cross sections [7], where the system coupling is much stronger [8]. Amongst these three coupling forms, friction coupling has the weakest response and shows changes in its magnitude over a long period [9]. Meanwhile, as the most important coupling form, junction coupling produces a pressure head larger Water 2020, 12, 1025 2 of 18 than the classical water hammer, and greatly depends on the robustness of the system [10]. Poisson coupling and friction coupling can greatly influence junction coupling, and, in turn, junction coupling ...

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Section: Outlet and Inlet Boundarymentioning

confidence: 99%

Fluid-Structure Interaction Response of a Water Conveyance System with a Surge Chamber during Water Hammer

Guo

Zhou

et al. 2020

Water

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“…More recently, Ref. [57] numerically observed the Liebau effect in pipe flow using a four-equation model which was adapted to describe the inertia of thrust blocks. The Liebau effect is rather an object of study in the field of physiological flows and is defined as the occurrence of valveless pumping through the application of a periodic force at a place which lies asymmetric with respect to the system configuration [116].…”

Section: Two Degree-of-freedom Modelsmentioning

confidence: 99%

“…[57,99,158] carried out experimental and numerical work based on a straight copper pipe which allowed a broad variety of anchoring configurations. In [57], a robust and accurate MOC-MOC code to simulate anchoring blocks taking into account their inertia and dry friction was presented. The blocks were nested in the numerical scheme as internal conditions and junction coupling was considered.…”

Section: Anchor and Support Forcesmentioning

confidence: 99%

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One-Dimensional Fluid–Structure Interaction Models in Pressurized Fluid-Filled Pipes: A Review

et al. 2018

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The present review paper aims at collecting and discussing the research work, numerical and experimental, carried out in the field of Fluid–Structure Interaction (FSI) in one-dimensional (1D) pressurized transient flow in the time-domain approach. Background theory and basic definitions are provided for the proper understanding of the assessed literature. A novel frame of reference is proposed for the classification of FSI models based on pipe degrees-of-freedom. Numerical research is organized according to this classification, while an extensive review on experimental research is presented by institution. Engineering applications of FSI models are described and historical accidents and post-accident analyses are documented.

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“…The results show that silencers with a small size can effectively attenuate ultra-low frequencies and ultra-broad bands.received considerable attention due to its theoretical value in a wide variety of applications; overall, it has been studied intensely. [4][5][6] The attenuation of low-frequency noise has been a challenge for many decades. At present, one of the most widely used and most effective methods is installing a duct silencer, which can prevent the noise from radiating externally, and in recent years, research on duct silencers has attracted increased attention, especially in the control technology of lowfrequency noise.…”

mentioning

confidence: 99%

Analysis of an Ultra-Low Frequency and Ultra-Broadband Phononic Crystals Silencer with Small Size

Liu

Wen

et al. 2019

J. Theor. Comp. Acout.

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Existing research shows that acoustic BG in a certain frequency range can be realized by installing an expansion chamber on duct system, but the problems of broadband and size limitations at low frequencies remain to be researched. The study of acoustic and elastic wave propagation in artificial periodic structures has received increasing attention for many decades, and the presence of bandgap (BG) in phononic crystals (PCs), which inhibits elastic/acoustic wave propagation within the BG' frequency range, supplies a new way to control noise and vibrations in duct system. Based on PC theory, a duct silencer backed with a gas-liquid expansion chamber is proposed to enhance the acoustic performance of low-frequency noise attenuation. The transfer matrix method (TMM) is used to investigate the acoustic BG properties. The influences on the BG properties of some key parameters are analyzed, and the band formation mechanism is revealed by the law of energy conservation. The results show that silencers with a small size can effectively attenuate ultra-low frequencies and ultra-broad bands.received considerable attention due to its theoretical value in a wide variety of applications; overall, it has been studied intensely. [4][5][6] The attenuation of low-frequency noise has been a challenge for many decades. At present, one of the most widely used and most effective methods is installing a duct silencer, which can prevent the noise from radiating externally, and in recent years, research on duct silencers has attracted increased attention, especially in the control technology of lowfrequency noise. [7][8][9] Huang and Choy studied the low-frequency noise attenuation performance of membrane and plate silencers which can achieve broadband noise suppression with a transmission loss of more than 10 dB. [10][11][12][13] The influence laws of the parameters and elimination mechanisms were analyzed, but the boundary constraint condition was complex, and the material parameters were required to be strictly placed. Cheng e al. used micro-perforated plates to eliminate the internal noise of duct system, but the low-frequency noise reduction properties were not robust. [14][15][16][17] Farooqui et al. analyzed the acoustic behaviors of a thin slow noise material (TSSM) located on the sidewall of a rectangular duct without and with flow, and this material was optimized to provide a large attenuation in the low-frequency range despite its small thickness, which was a significant sub-wavelength. 18,19 Yu et al. investigated the acoustic properties of a duct resonator tuned by an electro-active membrane theoretically and experimentally, and the TL peaks produced by the resonator can be shifted toward lower frequencies when the applied voltage is increased. Investigations showed that the proposed acoustic resonator could be implemented as an adaptive device for the active control of duct noise. 20 Traditional passive noise control techniques have size limitations and broadband problems in the low-frequency range. Over the past few decad...

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Fluid-structure interaction in straight pipelines with different anchoring conditions

Cited by 46 publications

References 21 publications

Fluid-Structure Interaction Response of a Water Conveyance System with a Surge Chamber during Water Hammer

Fluid-Structure Interaction Response of a Water Conveyance System with a Surge Chamber during Water Hammer

One-Dimensional Fluid–Structure Interaction Models in Pressurized Fluid-Filled Pipes: A Review

Analysis of an Ultra-Low Frequency and Ultra-Broadband Phononic Crystals Silencer with Small Size

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