Numerical simulation for erosion effects of three-phase flow containing sulfur particles on elbows in high sour gas fields

Zhang, Enbo; Zeng, Dezhi; Zhu, Hongjun; Li, Shuanggui; Chen, Dongbo; Li, Jie; Ding, Yawen; Tang, Gang

doi:10.1016/j.petlm.2017.12.008

Cited by 21 publications

(6 citation statements)

References 15 publications

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“…In addition, it can be found that the mass loss per unit area mainly occurs between 40° and 50°, with the most serious region between 43° and 48°, and gradually was spread to the surrounding area, forming oblique elliptical erosion area. The simulation results considering the presence of acidic substances can be verified from other papers [13]. Figure 12 shows the variation of quantities of particles hitting the wall.…”

Section: Cathode Current Density Of the Four Edgessupporting

confidence: 70%

Simulation Analysis of Erosion–Corrosion Behaviors of Elbow under Gas-Solid Two-Phase Flow Conditions

Zeng

Wenchuang

2020

Lubricants

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In the production and gathering process of coal gas, the complex composition of the coal gas, harsh environments, the complex medium, and high content of solid particles in slurry cause the equipment malfunctions and even failure because of erosion and corrosion. In the present study, COMSOL multi-physics finite element simulation software is used to simulate the erosion–corrosion behaviors of elbow in key chemical equipments. The electrochemical corrosion, solid particle erosion, chemical reaction, and turbulent flow are coupled together. The particle count method is proposed to clarify the erosion phenomenon. The simulation results show that particles with high turbulent intensity hit the wall of elbow directly, which forms a slanted elliptical erosion zone on the extrados surface at 40°–50°. The chemical reaction in turbulence has a difference in the concentration distribution of substances, and this phenomenon leads to different magnitudes of the corrosion current densities in the tube. Moreover, 1/6 released particles hit the extrados surface of the elbow. These findings are beneficial to understand the erosion–corrosion phenomena and design the elbow in key chemical equipment.

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Section: Cathode Current Density Of the Four Edgessupporting

confidence: 70%

Simulation Analysis of Erosion–Corrosion Behaviors of Elbow under Gas-Solid Two-Phase Flow Conditions

Zeng

Wenchuang

2020

Lubricants

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“…Zhang et al . [14] examined the erosion of bends due to the flow of a gas–liquid–solid mixture in numerical simulation, analysing the effects of the Stokes number on the particle trajectory and the erosion scar. The mixture contained 20% water, while particle diameters varied from 0.01 to 0.05 mm.…”

Section: Introductionmentioning

confidence: 99%

“…They illustrated the relationship between the Stokes number and the dynamic motion of the maximum erosion position and proposed three collision mechanisms that explain how the change in the Stokes number affects the erosion position. Zhang et al [14] examined the erosion of bends due to the flow of a gas -liquid-solid mixture in numerical simulation, analysing the effects of the Stokes number on the particle trajectory and the erosion scar. The mixture contained 20% water, while particle diameters varied from 0.01 to 0.05 mm.…”

Section: Introductionmentioning

confidence: 99%

Relationship between wear formation and large-particle motion in a pipe bend

Zhang

Lin

et al. 2019

R. Soc. open sci.

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Fine and large particles flowing through a bend in a pipe move differently and therefore erode the pipe differently. This paper simulates solid–liquid two-phase flow containing large particles in a bend and analyses the relationship between the wear formation and particle motion. Wear experiments are carried out using 3-mm glass bead particles at a mass concentration of 1–15%. At the same time, the flow field and the motion of the granular system are obtained in computational fluid dynamics–discrete element method simulation. The wear formation mechanism is revealed by comparing experiments with numerical simulations. The wear rate of the wall surface increases with the mass concentration, while the marginal growth rate decreases as the mass concentration increases. As the mass concentration increases to a certain value, the degree of wear reaches a maximum and remains unchanged subsequently because of the formation of a particle barrier along the bend wall. The particles near the wall region will bounce forward because of the periodic disturbance flow around particles. The impact of mass bouncing particles causes the formation of the erosion ripple on the test sheet.

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“…Виявлено місця максимального ерозійного зношування досліджуваних фасонних елементів трубопроводів. Ерозійне зношування відводів газопроводів зумовлене водно-рідкою фракцією інгібітора корозії та частинками сірки діаметром від 0,01 мм до 0,05 мм CFD моделюванням досліджено в [6]. Максимальна швидкість ерозії відводу збільшувалася зі збільшенням числа Стокса.…”

Section: Simulation Results Are Visualized In the Ansys Fluent Postprocessor By Constructing Erosion Velocity Rate Fields On The Contoursunclassified

Дослідження впливу геометричних параметрів відводів газо-прoводів на внутрішньотрубні ерозійні процеси

Doroshenko¹

2020

PDOGF

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The influence of diameter, bending angle and bending radius of gas pipelines bends on the location and extent of their erosion wear is investigated. The research is carried out with the help of CFD (Computational Fluid Dynamics) simulation using the Lagrangian approach (Discrete Phase Model) in the ANSYS Fluent R19.2 Academic software. The mathematical model of the continuous-phase motion is based on the solution of simultaneous Navier-Stokes equations, the continuity of closed two-parameter k-ε model turbulence with the corresponding initial and boundary conditions. The motion trajectories of the dispersed phases are monitored by integrating the equations of forces acting on the particles. The simulation of erosion wear of the gas pipeline bends is performed using Finney equation. The investigations are carried out for five different external diameters of the pipeline bends (89 mm, 219 mm, 530 mm, 1020 mm and 1420 mm). The angles of the bends are 30°, 45°, 60°, and 90°, and the bend radii are DN, 1.5 DN, 2 DN, 2.5 DN, and 3.5 DN. Natural gas was selected as the continuous phase, and sand was selected as the dispersed phase. The flow rate of the disperse phase, the motion velocity of the dispersed and continuous phases at the inlet of the bend and the pressure at the outlet of every simulated bends are assumed to be the same. The simulation results are visualized in the ANSYS Fluent postprocessor by constructing erosion velocity rate fields on the contours of gas pipeline bends. On the basis of the visualized results, it is determined that the largest influence on the location of the erosion wear of the pipeline bends is caused by the bend radius, and the largest effect on the amount of the erosion wear is caused by bend diameter. The influence of the geometric parameters of the bends on the location of their maximum erosion wear field is established. Graphical dependences of maximum velocity of erosion wear of gas pipeline bends on their geometric parameters are constructed.

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Numerical simulation for erosion effects of three-phase flow containing sulfur particles on elbows in high sour gas fields

Cited by 21 publications

References 15 publications

Simulation Analysis of Erosion–Corrosion Behaviors of Elbow under Gas-Solid Two-Phase Flow Conditions

Simulation Analysis of Erosion–Corrosion Behaviors of Elbow under Gas-Solid Two-Phase Flow Conditions

Relationship between wear formation and large-particle motion in a pipe bend

Дослідження впливу геометричних параметрів відводів газо-прoводів на внутрішньотрубні ерозійні процеси

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