Experimental and Numerical Analysis of Water Hammer Phenomenon in Pipeline with Fiber Optic Cable

Kubrak, Michał

doi:10.1061/(asce)ps.1949-1204.0000522

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…However, by inserting a hose inside a pipeline along its length, the physical properties of the entire pipeline system are altered and thus the pressure wave velocity is affected. The modified Korteweg formula that takes into account the internal hose has the following form [14]:…”

Section: Unsteady Pipe Flowmentioning

confidence: 99%

Water hammer mitigation by internal rubber hose

Kubrak

2024

Archives of Civil Engineering

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The aim of this research was to experimentally analyse the possibility of using a rubber hose placed inside a pipeline to mitigate the water hammer phenomenon. The experiments were conducted using a steel pipeline with an inner diameter of 53 mm and an EPDM rubber hose with a diameter of 6 mm. Hydraulic transients were induced by a rapid closure of the valve located at the downstream end of the pipeline system. In order to analyse the influence of steady-state flow conditions on the maximum pressure increase, measurements were carried out for different values of initial pressure and discharge. The experimental results indicate that placing a rubber hose inside a pipeline can substantially attenuate valve-induced pressure oscillations. It was observed that the initial pressure has a significant influence on the capacity of the rubber hose to dampen the water hammer phenomenon. Comparative numerical calculations were performed using the Brunone–Vitkovský instant acceleration-based model of unsteady friction. It was demonstrated that this approach does not allow satisfactory reproduction of the observed pressure oscillations due to the viscoelastic properties of the EPDM hose used in the tests.

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Section: Unsteady Pipe Flowmentioning

confidence: 99%

Water hammer mitigation by internal rubber hose

Kubrak

2024

Archives of Civil Engineering

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“…Without professional testing equipment, it is difficult to find the specific location of the cable break. How to accurately and quickly locate the open circuit position of the cable, solve the fault, reduce the economic loss, and reduce the difficulty of the maintenance personnel is a problem of great concern to the staff [5][6].…”

Section: Introductionmentioning

confidence: 99%

Research on an efficient method of cable breakpoint location

Zheng

Sun

Liao

et al. 2023

Second International Conference on Electronic Information Engineering and Computer Communication (EIECC 2022)

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With the rapid development of communication technology and electric power industry, cables have been widely used. The demand for cables in various industries has risen sharply, so a variety of cables have appeared in the market. After a large number of cables are used, cable break failures occur frequently. In addition, most cables are installed in the special environment of high altitude or underground. Without professional testing equipment, line maintenance personnel can hardly find the fault location. Based on this, an efficient cable breakpoint location method is proposed, and the modulus maximum detection algorithm based on wavelet transform is studied to realize the cable breakpoint location. The wavelet threshold de-noising technology is used to remove the noise in the transmission signal and reflection signal collected by the system. By comparing the results of different wavelet decomposition, the optimal wavelet basis function is selected, and the modulus maximum sequence of the wavelet coefficients obtained after wavelet decomposition is calculated, then the time difference between the transmission pulse and the reflection pulse can be detected, and the location of the cable breakpoint can be further determined. The existing cables in the laboratory are tested for many times, and the actual test results are analyzed, which can meet the technical requirements of cable breakpoint detection.

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Investigation of Pump Failure-Induced Waterhammer Waves: A Case Study

Triki

Essaidi

2021

Journal of Pressure Vessel Technology

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The present study analyzes the effect of the pipe material type on the transient flow behavior in a pumping system due to an accidental pump shutdown. The material types addressed in this study include steel and High- or Low-Density PolyEthylene (HDPE) or (LDPE); involving elastic and plastic rheological pipe-wall behavior. The numerical solution is developed basing on the Method Of Characteristics used for the discretization of the Extended One-Dimensional pressurized-pipe flow model, incorporating the Kelvin-Voigt and Vitkovsky rules. Experimental data from the literature were used to validate the numerical solver. The proposed numerical algorithm is then used to investigate the transient pressure-wave behavior induced by the power failure to a pumping station composed of an inline connection using different pipe material types. The findings show the severity of such a scenario, in terms of the magnitudes of induced up-surge and down-surge pressure-waves. Furthermore, this research demonstrates that plastic pipe-wall materials allow for substantial attenuation of surge magnitude in conjunction with the expansion of the period of pressure-wave oscillations. The observed attenuation and expansion effects are also found to be highly dependent on the plastic material type. In this respect, the findings indicate that the (LDPE-Steel) piping system's specific layout allows for the best tradeoff between the two last effects.

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Experimental and Numerical Analysis of Water Hammer Phenomenon in Pipeline with Fiber Optic Cable

Cited by 3 publications

References 20 publications

Water hammer mitigation by internal rubber hose

Water hammer mitigation by internal rubber hose

Research on an efficient method of cable breakpoint location

Investigation of Pump Failure-Induced Waterhammer Waves: A Case Study

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