Numerical investigation of erosion on a staggered tube bank by particle laden flows with immersed boundary method

Jin, Tai; Luo, Kun; Wu, Fan; Yang, Jing; Fan, Jianren

doi:10.1016/j.applthermaleng.2013.10.004

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…They thoroughly examined velocity, particle, and temperature profiles along the gas-flow path. Jin et al 31 investigated erosion on a staggered tube bank and obtained erosion characteristics under four types of coal ash particles with different Stokes numbers. Yao et al 32 realized the stainless steel erosion through two-phase jet impingement.…”

Section: Introductionmentioning

confidence: 99%

Numerical prediction of solid particle erosion in angle-cutting elbows with gas–solid flow

Liu

Wang

Liu

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Angle-cutting elbows (ACEs) are important components of pipelines for fluid diversion and distribution. Severe erosion may occur on the internal walls of ACEs used to transport solid–gas/liquid flow. Erosion may cause pipeline failures. Therefore, the ACE erosion is a fundamental problem. However, the literature on the erosion characteristics and structural optimization of ACEs is rarely reported. This study conducts a numerical prediction of solid particle erosion in ACEs with gas–solid flow. Simulation models based on the two-way coupled Eulerian–Lagrangian approach and the E/CRC model are combined with particle-wall rebound models and a user defined function in the dispersed phase model. Simulation results are verified through a comparison with previously reported experimental results. The findings show that serious erosion occurs in the downstream part of the concave wall of ACE, whereas only slight erosion occurs on the convex wall of ACE. Therefore, anti-erosion measures should be adopted for the concave wall of ACEs. In addition, structural optimization of ACEs for erosion reduction is conducted. The optimal cutting angle is 40° > 50°, and the optimal non-dimensional cutting length is <1.05. The influence of fluid parameters on erosion characteristics is also determined. The erosion rate on the concave wall increases linearly with particle diameter and exponentially with inlet velocity.

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Section: Introductionmentioning

confidence: 99%

Numerical prediction of solid particle erosion in angle-cutting elbows with gas–solid flow

Liu

Wang

Liu

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Examples include the erosion of pipes [1,2], the cleaning of electronic chips, the handling of powders, the transmission of diseases and the transport of pesticides. Knowledge of liquid or solidphases turbulent behaviour in ducts is more specifically of relevance both environmentally and industrially to flows in, for example, ventilations systems, heat exchangers and gas turbine cooling systems, and the ability to predict such behaviour is of value in more effective system design and operation.…”

Section: Introductionmentioning

confidence: 99%

“…Jin et al [1] first applied direct numerical simulation (DNS) method to study tubes located in the middle of duct with row of a 10x10 aligned tube bank together with considering coal ash particles collision and erosion. Yao et al [2] applied experimental method to investigate the erosion of stainless steel by two-phase impinging jet and indicated that the flow turbulence plays an important role in causing the amount of erosion.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of turbulent flow through a straight square duct

Zhao

Fairweather

2015

Applied Thermal Engineering

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Turbulent duct flows are investigated using large eddy simulation at bulk Reynolds numbers, from 4410 to 250000. Mean secondary flow are found to reveal the existence of two steamwise counterrotating vortices in each corner of the duct. Turbulence-driven secondary motions that arise in duct flows act to transfer fluid momentum from the centre of the duct to its corners, thereby causing a bulging of the streamwise velocity contours towards the corners. As Reynolds number increases, the ratio of centerline streamwise velocity to the bulk velocity decreases and all turbulent components increase. In addition, the core of the secondary vortex in the lower corner-bisector tends to approach the wall and the corner with increasing Reynolds number. The turbulence intensity profiles for the low Reynolds number flows are quite different from those for the high Reynolds number flows.Typical turbulence structures in duct flows are found to be responsible for the interactions between ejections from wall and this interaction results in the bending of the ejection stems, which indicates that the existence of streaky wall structures is much like in a channel flow.

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