Fluid–structure interaction with viscoelastic supports during waterhammer in a pipeline

Zanganeh, Roohollah; Ahmadi, Ahmad; Keramat, Alireza

doi:10.1016/j.jfluidstructs.2014.10.016

Cited by 52 publications

(24 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Proper modelling of flows of liquids under pressure in such systems remains a significant challenge. Among the key issues widely discussed in new publications on the subject, special emphasis is placed on the correct modelling: of the time-varying hydraulic resistance (Vardy and Brown, 2003;Zarzycki et al, 2011;Reddy et al, 2012), cavitation (Zarzycki and Urbanowicz, 2006;Lewandowski, 2009, 2012;Bergant et al, 2006;Karadžić et al, 2014;Soares et al, 2015), the interaction between the liquid and walls of the conduit Henclik, 2015;Zanganeh et al, 2015), the viscoelastic phenomenon that occurs during the flow in a piping made of engineering polymers (Weinerowska-Bords, 2015; Soares et al, 2012; Keramat et al, 2013;Pezzinga et al, 2014;Urbanowicz et al, 2016). Taking into account all of the above phenomena while simulating unsteady flows has seemed impossible until recently.…”

Section: Introductionmentioning

confidence: 99%

Analytical expressions for effective weighting functions used during simulations of water hammer

Urbanowicz

2017

jtam

View full text Add to dashboard Cite

For some time, work has been underway aimed at significant simplification of the modelling of hydraulic resistance occurring in the water hammer while maintaining an acceptable error. This type of resistance is modelled using a convolution integral, among others, from local acceleration of a liquid and a certain weighting function. The recently completed work shows that during efficient calculations of the convolution integral, the effective weighting function used does not have to be characterised by large convergence with a classical function (according to Zielke during laminar flow and to Vardy-Brown during turbulent flow). However, it must be a sum of at least two or three exponential expressions so that the final results of the simulation could be considered as satisfactory. In this work, it has been decided to present certain analytical formulas using which it will be possible to determine the coefficients of simplified effective weighting functions in a simple direct way.

show abstract

Section: Introductionmentioning

confidence: 99%

Analytical expressions for effective weighting functions used during simulations of water hammer

Urbanowicz

2017

jtam

View full text Add to dashboard Cite

show abstract

“…As for internal flow induced vibration, researchers use this expression to loosely describe two kinds of flow scenarios. The first is the dynamic response of a pipe structure to excitation under a variety of conditions, generally called transient pipe flows [40] [41], including water hammer [42] [43], cavitation [44] [45], multiphase flow [46], pipe whip [47], flow separation in elbows [44] [48] and mechanical components that include valves and supports [49] [50]. The large-scale transient processes in each of these flows have the potential to result in strong pipe vibrations.…”

Section: Classification Of Pipe Structure Vibrationmentioning

confidence: 99%

In-Situ Modal Response Characterization of Pipe Structures Through Reynolds Number Variation

Chen

Hugo

Park

2018

Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining

View full text Add to dashboard Cite

The modal response characterization of structures is a proven and reliable technique used to monitor system behavior and change, providing information for condition assessment and damage identification. In traditional modal response characterization procedures, an external mass excitation source is used to excite the system, and this is modeled as an impact function. This provides system forcing across a broad range of frequencies. In this investigation, an in-situ method of system excitation is explored. The modal characteristics of externally-supported pipe structures are investigated by varying the flow Reynolds number (Red). Given the increase in flow turbulence with Reynolds number, hydrodynamic pressure fluctuations on the pipe wall provide a varying excitation source. This removes the requirement for an external excitation source. A comparative analysis of data sets collected for both Acrylic and ABS pipe material show similar pressure spectra, while vibration spectra change significantly. Pressure spectra reveal a character whereby the spectral energy increases with increasing Reynolds number. A comparison of in-situ results to those obtained using traditional impact response tests show that vibration spectra collected through Reynolds number variation successfully capture the modal characteristics of the pipe-structure.

show abstract

“…Recently, the coupling method of characteristics and finite element method which is abbreviated as MOC-FEM approach is proposed to solve the fluid and pipe equations due to high computational accuracy. e fluid equation was solved by MOC approach, and the structural pipeline equation was solved by FEM approach conducted by researchers [23,24].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Vibration Analysis of Hydraulic Pipeline System under Multiexcitations

Gao

Zhang

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

Pipeline systems in aircraft are subjected to both hydraulic pump pressure fluctuations and base excitation from the engine. This can cause fatigue failures due to excessive vibrations. Therefore, it is essential to investigate the vibration behavior of the pipeline system under multiexcitations. In this paper, experiments have been conducted to describe the hydraulic pipeline systems, in which fluid pressure excitation in pipeline is driven by the throttle valve, and the base excitation is produced by the shaker driven by a vibration controller. An improved model which includes fluid motion and base excitation is proposed. A numerical MOC-FEM approach which combined the coupling method of characteristics (MOC) and finite element method (FEM) is proposed to solve the equations. The results show that the current MOC-FEM method could predict the vibration characteristics of the pipeline with sufficient accuracy. Moreover, the pipeline under multiexcitations could produce an interesting beat phenomenon, and this dangerous phenomenon is investigated for its consequences from engineering point of view.

show abstract

Fluid–structure interaction with viscoelastic supports during waterhammer in a pipeline

Cited by 52 publications

References 29 publications

Analytical expressions for effective weighting functions used during simulations of water hammer

Analytical expressions for effective weighting functions used during simulations of water hammer

In-Situ Modal Response Characterization of Pipe Structures Through Reynolds Number Variation

Experimental and Numerical Vibration Analysis of Hydraulic Pipeline System under Multiexcitations

Contact Info

Product

Resources

About