High-Speed Imaging of Water Hammer Cavitation in Oil–Hydraulic Pipe Flow

Jansson, Marcus; Andersson, Magnus; Karlsson, Matts

doi:10.3390/fluids7030102

Cited by 5 publications

(4 citation statements)

References 29 publications

(38 reference statements)

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“…Water supply systems were considered by Lyu et al [15], who showed that an appropriate water hammer protective scheme is very important in water supply systems. Water hammers can cause cavitation, as shown by Jansson et al [16] by means of a high speed camera. Aslam et al [17] have shown that the water hammer effect can be used to prevent membrane fouling.…”

Section: Introductionmentioning

confidence: 96%

Energy Intake Models for Intermittent Operation of Dead-End Microfiltration Filling Line

et al. 2022

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In filling lines equipped with membrane separation devices in the form of filters energy, consumption is only one of the important working parameters, the other being sustainable filter performance in terms of separation efficiency. As the filling line is typically equipped with a valve, intermittent operation of the filter is an important form of its use. Whereas the overall energy consumption of the filtration process is governed by the continuous operation mode, the intermittent mode, characterised by opening/closing of the valve, contributes most to problems of filter failure, i.e., the breakthrough of filtered particles through the membrane. A model for determination of the energy intake of a microfiltration membrane during the opening and closing of a valve is presented in this work. The model is based on computational analysis of the pressure wave signals recorded during the opening/closing of the valve using Fourier transform, and expressed in a nondimensional filter area specific energy intake form. The model is applied to a case of constant pressure dead-end microfiltration with three filter types: a single membrane filter, a stacked filter and a pleated filter with filtration surface areas ranging from 17.7 cm2 to 2000 cm2. Both clean filters, as well as partially clogged filter cases are taken into account. Second order polynomial models of the energy intake are developed and evaluated based on extensive analysis of the experimental data. The analysis of energy intake results show that the largest energy intake was observed for the clean filter case. When membrane fouling occurs at the constant flow rate values it leads to larger energy intake, however, due to a decreasing specific flow rate during fouling these values do not exceed the clean filter case.

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Section: Introductionmentioning

confidence: 96%

Energy Intake Models for Intermittent Operation of Dead-End Microfiltration Filling Line

et al. 2022

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“…Wan et al [15] designed a physical test model with several consecutive bends and concluded through a large number of tests that an appropriate reduction in the inclination angle of the pipeline and an increase in the flow rate can effectively discharge the stagnant gas mass in the pipeline. Jansson et al [16] studied a pipeline water hammer with column separation in a flow range through physical tests. The results showed that there was no obvious separation interface; the boundary was composed of dispersed small bubbles mixed with a larger steam structure, in which the bubbles seemed to become smaller after each rupture.…”

Section: Introductionmentioning

confidence: 99%

Study on the Transient Flow Characteristics of a Hump Water Pipeline Based on the Random Distribution of Bubbles

Wang,

Hu,

Song

et al. 2023

Water

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Aiming at establishing the transient flow characteristics of gas–liquid two-phase flow in high-undulation water pipelines, based on the bubble distribution law measured using physical tests, the bubble distribution law function was input into the hump-pipe fluid domain model, and CFD numerical simulation was carried out for different flow rates and different air contents. The CLSVOF two-phase flow model and the RNG k-ε turbulence model were used to analyze the flow pattern evolution and pressure pulsation propagation in the process of gas–liquid two-phase flow through a hump pipe. The results show that the bubble size has a lognormal distribution, the equivalent diameter is between 3 mm and 10 mm, and the evolution of the flow pattern in the hump pipe is complex and violent. In the horizontal pipe section, there are three main flow patterns: bubble flow, wavy flow and segment plug flow. In the vertical pipe, there are two main flow patterns, slug flow and churning flow, and the flow pattern is affected by the flow rate and the air content rate. When air bubbles or air pockets in the pipeline flow through a certain area, this leads to a steep increase and decrease in the pressure pulsation amplitude in the region, and the pressure fluctuation is extremely frequent. Compared with the water flow rate, the air content is the main factor affecting the relative pressure pulsation amplitude under the condition of a 0.15-air content operating mode, which is generally approximately two to six times that of the 0-air content operating mode. The results of the research should facilitate the prediction of stagnant gas pipeline system bursts and water hammer protection, providing a theoretical basis and calculation parameters.

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“…Cavitation leads to a reduction in the performance and life span of devices in hydraulic systems. There are several studies that have investigated cavitation flow in pipelines [17][18][19], turbines [20,21], pumps [22,23], and valves [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…Fluids 2023, 8, x FOR PEER REVIEW 3 of 18 and life span of devices in hydraulic systems. There are several studies that have investigated cavitation flow in pipelines [17][18][19], turbines [20,21], pumps [22,23], and valves [24,25]. Ultrasonic processing is widely applied in the petroleum and chemical industries.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Potential of Cavitation Erosion-Induced Heavy Crude Oil Upgrading

Baimukhametov,

Kayumov,

Dengaev

et al. 2023

Fluids

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The application of ultrasonic waves in the processing of hydrocarbons is a new promising technology that has developed rapidly in recent years. However, the acoustic-induced cavitation erosion phenomenon is poorly studied. In this paper, a comparison study of cavitation erosion was carried out in water and oils with different viscosities produced from Ashal’cha and North Komsomol using an ultrasonic reactor operating at an industrial frequency of 20 kHz. The acoustic spectra obtained from hydrophones during the ultrasonic treatment of fluids can be characterized by using subharmonics of the main frequency and a continuous white noise level. Moreover, the cavitation erosion of aluminum foil under various ultrasound irradiation times and power levels was thoroughly investigated. It has been found that the process of ultrasonic cavitation has a less erosive impact on metal foil in oil due to its high viscosity. In addition, the formation of microflows in the oil phase, which also intensify the erosion process, is hindered. Cavitation erosion in the Ashal’cha oil sample exhibited a higher intensity compared to that in the North Komsomol oil sample. It was found that upon increasing ultrasound intensity in the case of the viscous (Ashal’cha) oil sample, cavitation stability was disrupted. In turn, this led to a reduction in the collapse energy of the cavitation bubbles. The results we obtained enable the assessment of cavitation erosion in crude oil and could be used to improve methodologies for monitoring and optimizing cavitation processes in crude oil.

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High-Speed Imaging of Water Hammer Cavitation in Oil–Hydraulic Pipe Flow

Cited by 5 publications

References 29 publications

Energy Intake Models for Intermittent Operation of Dead-End Microfiltration Filling Line

Energy Intake Models for Intermittent Operation of Dead-End Microfiltration Filling Line

Study on the Transient Flow Characteristics of a Hump Water Pipeline Based on the Random Distribution of Bubbles

Unveiling the Potential of Cavitation Erosion-Induced Heavy Crude Oil Upgrading

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