A probability model of predicting the sand erosion profile in elbows for gas flow

Liu, Haixiao; Zhou, Zhongwei; Li, Mingyang

doi:10.1016/j.wear.2015.09.012

Cited by 30 publications

(7 citation statements)

References 22 publications

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“…The research shows that different parameters will affect the erosion results of elbows. 20 During erosion, erosion scars are mainly concentrated in the extrados and outlet of intrados, 21,22 while the inner arch produces a particle free zone due to the shadow effect. 23 However, when the elbow with corrosion defect is eroded, the erosion area and location will change due to the change of parameters.…”

Section: Influence Of Different Parametersmentioning

confidence: 99%

Study on erosion wear mechanism of natural gas elbow pipe with uneven corrosion defects

Han

Cai

Guan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Due to erosion and corrosion, natural gas pipelines can be easily damaged, causing uneven corrosion defects on the inner surface of the elbow. The existence of uneven corrosion defects will affect the surface structure of the inner arch of the elbow. In this paper, the influence of uneven corrosion defects on the further corrosion of elbow was studied by computational fluid dynamics (CFD). The results show that the particles are distributed in a regular V-shape after hitting the outer arch of the non-defect elbow. However, part of the particles bounced irregularly after hitting the defect elbow, forming an irregular particle trajectory region. The uneven corrosion defects that have been created can affect the particle trajectory distribution. When the axial angle α is 45°–55° and the hoop angle φ is between 60° and 120°, the erosion of defect elbow is easily affected by corrosion pits. In addition, the maximum erosion rate of non-defect elbow can be increased with the increase of particle diameter. However, in terms of the impact of particle diameter on erosion, there are two inflection points in the maximum erosion rate of the defect elbow, showing the trend of “increase,”“decrease” and “increase.” The research can provide a theoretical support for subsequent engineering applications.

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Section: Influence Of Different Parametersmentioning

confidence: 99%

Study on erosion wear mechanism of natural gas elbow pipe with uneven corrosion defects

Han

Cai

Guan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…In these researches, there were no comprehensive simulated erosion failure processes, such as electrochemical corrosion through current density or mass loss per unit area. Based on CFD model, the researchers have further simulated the failure process of particle erosion without electrochemical corrosion and obtained the trajectory of the particles hitting the wall [4]. Mass loss per unit area and the quantities of particles hitting the wall of elbow have not yet been obtained.…”

Section: Introductionmentioning

confidence: 99%

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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“…The erosion by solid particle impact is a complex phenomenon and involves the interplay of several factors including flow pattern and geometry, fluid properties, particle size/shape distribution, and particle/surface material characteristics [1][2][3]. The standard finite-volume computational fluid dynamics (CFD) methods coupled with un-resolved particle tracking (Eulerian-Lagrangian) and erosion models have been employed [4][5][6][7] to predict erosion rates in different geometries. In these studies, CFD techniques are used to solve the flow field and track particles.…”

Section: Introductionmentioning

confidence: 99%

A multi-physics peridynamics-DEM-IB-CLBM framework for the prediction of erosive impact of solid particles in viscous fluids

Zhang

Pan

Zhang

et al. 2019

Computer Methods in Applied Mechanics and Engineering

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In this paper, a new fully-resolved framework capable of capturing the fundamental physics of particle-fluid interactions, the collision of particles with solid surfaces, and the resulting damage is proposed. A coupled DEM-IB-CLBM, consisting of a discrete element method (DEM), an immersed boundary (IB) method, and a cascaded lattice Boltzmann method (CLBM), is used to fully resolve the interaction of the particles with the surrounding viscous fluid. The peridynamics theory is then implemented and used to predict the impact damage to the target material. This framework is validated by comparing the trajectory of a particle-wall collision event in a viscous fluid with the previous results in the literature. Furthermore, the variation of the restitution coefficient with the impact velocity is in a good agreement with the available experimental results. The influence of multiple impacts and the resulting surface damage on the fluid dynamics of the system is investigated. It is demonstrated that the method correctly predicts the expected effects of multiple collisions and impact angle variations on the surface damage.

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A probability model of predicting the sand erosion profile in elbows for gas flow

Cited by 30 publications

References 22 publications

Study on erosion wear mechanism of natural gas elbow pipe with uneven corrosion defects

Study on erosion wear mechanism of natural gas elbow pipe with uneven corrosion defects

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

A multi-physics peridynamics-DEM-IB-CLBM framework for the prediction of erosive impact of solid particles in viscous fluids

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