Detection of slug flow from pressure measurements

Lin, Peifeng; Hanratty, Thomas J.

doi:10.1016/0301-9322(87)90003-6

Cited by 110 publications

(29 citation statements)

References 4 publications

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“…Energies 2017, 10, 634 2 of 13 structural damage, the corrosion rate, and the coating protection of the pipeline [8,9], therefore, it is also very important to predict the formation mechanism of the slug flow, and further understand its characteristics by measuring the pressure fluctuation signal [10][11][12]. However, studies on gas-liquid multiphase pumps are mainly concentrated on energy performance and flow instability.…”

Section: Configuration and Mesh Of The Gas-liquid Two-phase Pumpmentioning

confidence: 99%

“…For instance, in order to describe the relationship between the flow pattern and the pressure, Hanafizadeh et al [7] drew a flow regime map by measuring the pressure fluctuation signal of the gas-liquid two-phase flow in a vertical pipe. In practical applications, the frequency of the slug flow is closely related to the structural damage, the corrosion rate, and the coating protection of the pipeline [8,9], therefore, it is also very important to predict the formation mechanism of the slug flow, and further understand its characteristics by measuring the pressure fluctuation signal [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Pressure Fluctuation in a Gas- Liquid Two-Phase Mixed-Flow Pump

Zhang

Zhu

2017

Energies

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Abstract:To explore the pressure fluctuation characteristics in a mixed-flow pump handling a gas-liquid two-phase flow, an unsteady simulation was carried out with ANSYS CFX for the whole flow passage when the inlet gas void fraction (IGVF) was 0%, 5%, and 10%, respectively. Under pure water conditions (IGVF = 0%), the reliability of the simulation was verified by comparing with the experiment in both aspects of external characteristics and fluctuation. Through the implementation of the fast Fourier transform (FFT) algorithm, the characteristics of the pressure fluctuation in the impeller and the guide vane were obtained at different IGVF conditions. The results demonstrate that pressure fluctuations exist under different IGVF conditions due to the rotor-stator interaction and the gas-liquid phase interaction, and the intensity of the fluctuation is firstly enhanced, and then weakened, along the streamwise direction with the maximum located near the impeller outlet. The relationship between the gas content and the pressure fluctuation was analyzed, and it is shown that the regional pressure fluctuation will be intensified only if the gas content therein reaches a certain level and the local phase interaction is strong. In addition, the pressure fluctuation in both the rotor-stator interaction region and the guide vane may be effectively inhibited under small IGVF conditions.

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Section: Configuration and Mesh Of The Gas-liquid Two-phase Pumpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Study of Pressure Fluctuation in a Gas- Liquid Two-Phase Mixed-Flow Pump

Zhang

Zhu

2017

Energies

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“…An important type of perturbation is the change in void fraction due to the occurrence of hydrodynamic instabilities generated by void fraction waves or by the nonstationary character of certain flow regimes. For instance, the pressure variations during slug flow in vertical pipes present such properties (Tutu 1982(Tutu , 1984; see also Lin & Hanratty 1989 for horizontal slug flow). In the present review we focus on the fluid mechanical aspects of stable continuous gas-lift operating conditions.…”

Section: Figurementioning

confidence: 99%

Fluid Mechanical Aspects of the Gas-Lift Technique

Guet

Ooms

2006

Annu. Rev. Fluid Mech.

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The gas-lift technique comprises the injection of gas bubbles in vertical oil wells to increase production. It is based on a reduction of the tubing gravitational pressure gradient. Several fluid-flow phenomena influencing such vertical gas-liquid flows are discussed. These effects include the radial distribution of void fraction and of gas and liquid velocity, flow regime changes, and system stability problems. Associated consequences for gas-lift performance and related optimization approaches are also discussed.

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“…Lin and Hanraty (1987) used pressure measurements to detect the intermittent flow The model was developed and tested on experimental data and a wide range of variables. Sekoguchi et al (1987) applied a statistical method and the mean void fraction to identify flow patterns.…”

Section: Introductionmentioning

confidence: 99%