Mitigating elbow erosion with a vortex chamber

Duarte, Carlos Antonio Ribeiro; Souza, Francisco José de; Santos, Vinicius Fagundes dos

doi:10.1016/j.powtec.2015.10.032

Cited by 70 publications

(22 citation statements)

References 19 publications

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“…The maximum erosion at the rst and second bends occurs at angles of 42 and 58 , respectively. The erosion pattern at the rst bend is similar to numerical predictions presented by other researchers [27] for the single standard elbow.…”

Section: Resultssupporting

confidence: 87%

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Numerical modeling of sand particle erosion in return bends in gas-particle two-phase flow

et al. 2018

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In gas and oil industry, erosion damage to pipelines' bends and elbows due to the presence of sand particles has been a challenging issue. In this study, a computational model approach was used to evaluate the erosion rates at di erent vertical return bends: sharp bend, standard elbow, 180 pipe bend, and long elbow. The air ow in the pipe was simulated using the SIMPLE method and the k ! SST turbulence model. An Eulerian-Lagrangian approach was used to predict particle trajectories and related erosion rates. Di erent particle sizes and mass ow rates were considered, and Oka model was used in these simulations to evaluate the erosion rate. Under the same condition, the simulation results indicated that the sharp return bends experienced the highest erosion rates, and the 180 bends experienced the lowest erosion among the studied con gurations. It was also found that the erosion rate was linearly proportional to the mass ow rate of particles for all cases studied. contributions are in the elds of computational uid dynamics, multiphase ows, particle transport, heat transfer, thermal systems, and energy management.

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Section: Resultssupporting

confidence: 87%

“…In addition, they observed a reduction in the erosion rate with increasing the pipe diameter. Duarte et al [27] studied the erosion rate based on the four-way coupling of airparticle in the standard elbow and the bend equipped with a vortex chamber. They compared erosion rates in di erent particle mass loadings for both geometries.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of sand particle erosion in return bends in gas-particle two-phase flow

et al. 2018

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“…Particle shielding is a concept that suggests pipeline wear decreases with increasing particle concentration in the pipeline [36,53]. High-velocity particle-wall impacts are partially mitigated by inter-particle contacts, whereby only a fraction of the conveyed particles come into direct contact with the pipe wall.…”

Section: The Concept Of Particle Shieldingmentioning

confidence: 99%

Particle attrition mechanisms, their characterisation, and application to horizontal lean phase pneumatic conveying systems: A review

et al. 2018

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Understanding particle attrition is vital to the optimisation of a wide range of industrial processes. Lean phase pneumatic conveying is one such process, whereby the high energy particle impacts can cause undesirable loss in product quality or change in bulk behaviour. The attrition process is resolved into a material function and a process function; the combination of these functions dictate the attrition mechanism present, and the magnitude of failure observed. Subsequently, the forces applied to the particles are examined within the context of lean phase pneumatic conveying. Finally, empirical and numerical models are reviewed along with comments on experimental method. To summarise some of the findings of this review: the requirement of standardised test equipment is recognised in order to compare the wide variety of particulate materials under comparable loading conditions; stronger correlation between the results obtained from different particle attrition test methods is required; and finally, seldom are the manufacturing conditions (where applicable) linked to the particulate attrition behaviour.

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“…The transport of undesired particulates with a fluid flow occurs during a diverse array of phenomena involved in petroleum harvesting and processing and power generation plants, air and terrestrial vehicles, and pharmaceutical manufacturing and biological processes. [1][2][3][4][5][6] Among other effects, these particulates can contribute to the wear of the surfaces that come into contact with the fluid carrying the particles. The removal of particles from the fluid can assist in reducing the resulting level of wear.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of particle trapping in various groove configurations in straight and bent flow channels

Florio¹

2020

SIMULATION

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A novel computational technique is applied to investigate particle trapping in straight and bent channel flow paths with various groove configurations in high-speed compressible, particle laden flow. The technique is valid for particle sizes of the same order of magnitude as the groove dimensions and where the particle–flow path, particle–particle, and particle–flow interactions play significant roles in determining the particle motion. The sacrificial grooves within the flow path can remove particles from the flow to reduce particle impact-induced wear. The feasibility of the trapping grooves and the conditions for which they are most beneficial can be gleaned from analysis of the model results. Three groove configurations are studied: a straight groove, a flared groove, and a 45 degree angle groove, for the same groove entrance size, groove depth, and spacing in a straight channel and a channel with a 90 degree bend. A transient maximum of 22% of the particles were trapped for the flared groove for the bent channel and a transient maximum of 15% of the particles for the straight channel configuration. The second groove of the bent channel produces the greatest single groove particle holding of 8.25% of all of the particles for the flared grove configuration. The contributions of the groove positioning, groove shape, gas flow, and particle interaction conditions to the trapping characteristics can be readily obtained from examination of the model results since the modeling technique includes detailed treatment of particle–flow path and flow interactions, allowing for the study of the mechanisms acting to trap the particles within the grooves.

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Mitigating elbow erosion with a vortex chamber

Cited by 70 publications

References 19 publications

Numerical modeling of sand particle erosion in return bends in gas-particle two-phase flow

Numerical modeling of sand particle erosion in return bends in gas-particle two-phase flow

Particle attrition mechanisms, their characterisation, and application to horizontal lean phase pneumatic conveying systems: A review

Numerical investigation of particle trapping in various groove configurations in straight and bent flow channels

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