Fluid-Structure Interaction During Artificially Induced Water Hammers in a Tube With a Bendexperiments and Analyses

Altstadt, E.; Carl, Helmar; Prasser, H.-M.; Weis, R.

doi:10.1615/multscientechn.v20.i3-4.10

Cited by 6 publications

(7 citation statements)

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“…[120] verified that there is no pressure wave reflection from an immobile elbow but that there is due to the elbow movement. These findings were confirmed once more in [123].…”

Section: Four Degree-of-freedom Modelssupporting

confidence: 65%

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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“…[120] verified that there is no pressure wave reflection from an immobile elbow but that there is due to the elbow movement. These findings were confirmed once more in [123].…”

Section: Four Degree-of-freedom Modelssupporting

confidence: 65%

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

et al. 2018

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“…When the user's water consumption is the highest, the water pump and the pool supply water to the user at the same time, at this time, the opposite water supply mode is formed. A large number of literatures [5][6] have shown that when the opposite water supply is used, the safety of the pipe network is better than that of the single water source.…”

Section: Analysis Of the Most Unfavorable Working Conditions Of Water...mentioning

confidence: 99%

Analysis of water supply system characteristics and water hammer protection measures in hilly towns

Yuan

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The terrain of hilly areas is undulating. The water supply system of small towns in this area is characterized by small scale of water consumption, large variation of water quantity, complex operation of pipe network, frequent start and stop of pumps, poor integrity of pipe network and low safety and reliability. Therefore, the layout and operation management of water supply pipe network caused many problems, and the water hammer protection of pipe network can not be ignored. Taking K town in typical hilly area as the object, the characteristics of water supply are investigated and analyzed, and the water hammer and protection measures are analyzed, in order to provide reference for the safe and stable operation of water supply network in small towns in hilly area.

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“…The junction coupling at elbows is illustrated in Figure 2. (15) Where subscript L denotes the pipe nearest to the end of the pipeline upstream the chamber, subscript R denotes the computation node nearest to the head end of the pipeline downstream the chamber, mV represents the mass of the surge chamber and J represents the rotating inertia of the lumped mass block around the x-axis.…”

Section: Elbow Tubementioning

confidence: 99%

“…Afterwards, a surge takes place in the surge chamber induced by pressure wave. From Equations (10) to (15), considering FSI, the downstream of surge chamber has considerable discharge and there is an in-negligible pipe-wall vibration near surge chamber. Meanwhile, a stress wave and a pressure wave are produced.…”

Section: Experimental Verificationmentioning

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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Fluid-Structure Interaction During Artificially Induced Water Hammers in a Tube With a Bendexperiments and Analyses

Cited by 6 publications

References 0 publications

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

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

Analysis of water supply system characteristics and water hammer protection measures in hilly towns

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

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Fluid-Structure Interaction During Artificially Induced Water Hammers in a Tube With a Bendexperiments and Analyses

Cited by 6 publications

References 0 publications

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

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

Analysis of water supply system characteristics and water hammer protection measures in hilly towns

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

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Product

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Fluid-Structure Interaction During Artificially Induced Water Hammers in a Tube With a Bendexperiments and Analyses