Simulation Model and Case Study of Drainage Process After Pressure Test of Large Drop Natural Gas Pipeline

Liu, Enbin; Peng, Yong; Peng, Shanbi; Sun, Haiyang; Qiao, Weibiao; Azimi, Mohammadamin

doi:10.1109/access.2020.2976205

Cited by 3 publications

(3 citation statements)

References 45 publications

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“…The force balance equation of the particle (particle inertia = various forces acting on the particle) in the Cartesian coordinate system ( x -direction) is where F D ( u – u p ) is the drag force per unit mass of the particle. F D can be expressed as where u is the fluid phase velocity, u p is the particle velocity, μ is the hydrodynamic viscosity, ρ is the fluid density, ρ p is the particle density, d p is the particle diameter, and Re is the relative Reynolds number (particle Reynolds number), which is defined as The drag coefficient C D can adopt the following expression: For spherical particles, within a certain Reynolds number range, a 1 , a 2 , and a 3 in the above formula are constants. , …”

Section: Mathematical Modelmentioning

confidence: 99%

“…For spherical particles, within a certain Reynolds number range, a 1 , a 2 , and a 3 in the above formula are constants. 33,34 The particle diffusion around the average orbit of the particle group is calculated by a random method, and the corresponding particle concentration is expressed by the Gaussian probability density function (PDF). The particle diffusion caused by fluid turbulence determines the variance of the PDF.…”

Section: Mathematical Modelmentioning

confidence: 99%

See 1 more Smart Citation

Study on Erosion Behavior and Separation Efficiency of a Shale Gas Vertical Separator

Liu

Tian

Li³

et al. 2021

Energy Fuels

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In a shale gas gathering and transportation station, the sand particles that are not separated by the upstream desander will cause erosion damage to the vertical separator. In response to this problem, based on the field data of a production well in the Changning area, the corresponding mathematical model and vertical separator geometric model were established. On the basis of the software FLUENT, the effects of different gas velocity, particle size, and sand mass flow on the erosion of the separator and the motion of particles were simulated. The corresponding results show that the erosion scar of the inlet baffle presents a ring shape, and the maximum erosion position on the wall changes with the increase of gas velocity. The erosion rate of the inlet baffle is proportional to the sand flow rate and geometrically related to the gas velocity; the maximum erosion rate of the vertical separator is 520 μm/a under the conditions of 6 kg/d sand input; the separation efficiency decreases with the increase of particle size and speed.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Study on Erosion Behavior and Separation Efficiency of a Shale Gas Vertical Separator

Liu

Tian

Li³

et al. 2021

Energy Fuels

Self Cite

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“…Energy is an important foundation of the national economy and an important indicator of production technology and living standards 1‐5 . Especially electricity, which is an important pillar of economic and social development.…”

Section: Introductionmentioning

confidence: 99%

Fastest‐growing source prediction of US electricity production based on a novel hybrid model using wavelet transform

Qiao¹,

Li²,

Liu

et al. 2021

Intl J of Energy Research

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Electricity is an important indicator for economic development, especially electricity production (EP), which is electricity industry managers making strategic decisions. There are many ways to produce electricity, which is the source of rapid growth in EP is rarely studied. Due to the nonstationary and nonlinearity of the EP time series, traditional methods are less robust to predict it. In this study, a novel combination prediction model is proposed based on wavelet transform (WT), long short-term memory (LSTM), and stacked autoencoder (SAE). Comparisons between the SAE-LSTM and the advanced prediction model. We compared SAE-LSTM and the advanced prediction model including BP (Back Propagation) etc. In addition, the performance comparison of the different wavelet layers based on SAE-LSTM and the performance comparison of the EMD and EEMD based on SAE-LSTM are also compared. At last, future average growth rates (June 2021 ! December 2022) are predicted. The empirical result shows that the combination model in view of SAE-LSTM exceeds the benchmark models. The results also imply that WT-SAE-LSTM outperforms the EMD, EEMD-SAE-LSTM, and SAE. Based on the optimal orders and layers of Coiflets combining with SAE-LSTM, natural gas is the fastest-growing source of EP in the United States.

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Research on the flow-induced vibration characteristics based on heat–fluid–structure coupling in natural gas loop

Qiu,

Ren,

Zhang

et al. 2023

AIP Advances

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To research the flow-induced vibration characteristics of the natural gas loop, unsteady numerical simulation is carried out on the loop calculation model under different ambient temperatures and different flow rates, and the influence of different flow rates on the dynamic characteristics of the flow field and its induced vibration characteristics is obtained. The results show that the inherent frequency of the natural gas loop increases slightly under the action of heat–fluid–solid coupling. The maximum equivalent stress of the loop increases with the increase in ambient temperature under low flow conditions, but it is almost constant under high flow conditions. The smaller the cross-sectional area of the loop pipeline inlet, the greater the pressure, and the more significant the pressure gradient along the flow direction. The pressure pulsation of monitoring points in the pipeline under different flow rates presents different rules, and the pulsation amplitude of pipes with different diameters is different, among which the amplitude of the pipe with a diameter of 250 mm is the largest and that of the pipe with a diameter of 150 mm is the smallest. The pressure pulsation signals are concentrated in the low-frequency band of 0–10 Hz, and the range of the band decreases with the increase in the flow rate. The vibration frequency of the loop structure is close to the fluid pressure pulsation frequency and the inherent frequency under the action of heat–fluid–solid coupling, which causes a resonance of about 2 Hz.

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Simulation Model and Case Study of Drainage Process After Pressure Test of Large Drop Natural Gas Pipeline

Cited by 3 publications

References 45 publications

Study on Erosion Behavior and Separation Efficiency of a Shale Gas Vertical Separator

Study on Erosion Behavior and Separation Efficiency of a Shale Gas Vertical Separator

Fastest‐growing source prediction of US electricity production based on a novel hybrid model using wavelet transform

Research on the flow-induced vibration characteristics based on heat–fluid–structure coupling in natural gas loop

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