Erosion of Metallic Plate by Solid Particles Entrained in a Liquid Jet

Benchaita, M. T.; Griffith, P.; Rabinowicz, E.

doi:10.1115/1.3185891

Cited by 62 publications

(35 citation statements)

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“…These two assumptions are based on the condition of fairly dilute particle concentration. The same assumptions were made [9,13,18,19,31,32] in the solution of similar problems of low particle concentration (less than 2-3% by weight). It is also assumed that the in uence of continuous phase turbulence on particle impact velocity and angle close to the wall is neglected in comparison to the mean ow e ect.…”

Section: Particle Trackingmentioning

confidence: 98%

Solid-particle erosion in the tube end of the tube sheet of a shell-and-tube heat exchanger

Habib

Badr

Said

et al. 2006

Int. J. Numer. Meth. Fluids

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SUMMARYErosion is one of the major problems in many industrial processes, and in particular, in heat exchangers. The e ects of ow velocity and sand particle size on the rate of erosion in a typical shell-and-tube heat exchanger were investigated numerically using the Lagrangian particle-tracking method. Erosion and penetration rates were obtained for sand particles of diameters ranging from 10 to 500 m and for inlet ow velocities ranging from 0.197 to 2:95 m=s. A ow visualization experiment was conducted with the objective of verifying the accuracy of the continuous phase calculation procedure. Comparison with available experimental data of penetration rates was also conducted. These comparisons resulted in a good agreement. The results show that the location and number of eroded tubes depend mainly on the particle size and velocity magnitude at the header inlet. The rate of erosion depends exponentially on the velocity. The particle size shows negligible e ect on the erosion rate at high velocity values and the large-size particles show less erosion rates compared to the small-size particles at low values of inlet ow velocities. The results indicated that the erosion and penetration rates are insigniÿcant at the lower end of the velocity range. However, these rates were found to increase continuously with the increase of the inlet ow velocity for all particle sizes. The particle size creating the highest erosion rate was found to depend on the ow velocity range.

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Section: Particle Trackingmentioning

confidence: 98%

Solid-particle erosion in the tube end of the tube sheet of a shell-and-tube heat exchanger

Habib

Badr

Said

et al. 2006

Int. J. Numer. Meth. Fluids

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“…Laitone [12] was one of the first to comment that particles approaching a surface always impinge with angles of less than 90 o indicating that there is always a difference between the true incidence angle and the angle of the approaching flow. Benchaita et al, [13] have noted that the form and dimensions of the erosion crater in a copper target subject to a 20 mm square section jet consisting of a 0.3 wt.% suspension of silica sand in water were consistent with a spread in particle trajectories from normal to more inclined angles. They identified three regions in a jet with normal incidence; a uniform flow at the nozzle exit, a streamlined flow near the target and a uniform exit flow parallel to the surface.…”

Section: Introductionmentioning

confidence: 99%

Monitoring acoustic emission (AE) energy in slurry impingement using a new model for particle impact

Droubi

Reuben

White

2015

Mechanical Systems and Signal Processing

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A series of systematic impact tests have been carried out to investigate the influence of particle size, free stream velocity, particle impact angle, and nominal particle concentration on the amount of energy dissipated in a carbon steel target using a slurry impingement erosion test rig, as indicated by the acoustic emission (AE) recorded by a sensor mounted on the back of the target. Silica sand particles of mean particle size 152.5, 231, and 362.5 μm were used for impingement on the target at angles varying between 30 o and 90 o while the free stream velocity was changed between 4.2 and 12.7 ms -1 .In previous work by the authors, it was demonstrated that the AE time series associated with particle-laden air striking a carbon steel target could be described as the cumulation of individual particle arrival events each drawn from a statistical distribution model. The high arrival rate involved in a slurry jet poses challenges in resolving individual particle impact signatures in the AE record, and so the model has been extended in this paper to account for different particle carrier-fluids and to situations where arrivals cannot necessarily be resolved.

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“…These two assumptions are based on the condition of fairly dilute particle concentration. The same assumptions were made by Lu et al [4], Keating and Nesic [5], Edwards et al [6], Wallace et al [7], Benchaita et al [22] and Shirazi et al [23] in the solution of similar problems of low particle concentration (less than 2-3% by weight). Taking the main hydrodynamic forces into consideration, the particle equation of motion can be written [7] as…”

Section: Particle Trackingmentioning

confidence: 63%

Numerical calculations of erosion in an abrupt pipe contraction of different contraction ratios

Habib

Badr

Ben‐Mansour

et al. 2004

Numerical Methods in Fluids

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SUMMARYErosion predictions in a pipe with abrupt contraction of di erent contraction ratios for the special case of two-phase (liquid and solid) turbulent ow with low particle concentration are presented. A mathematical model based on the time-averaged governing equations of 2-D axi-symmetric turbulent ow is used for the calculations of the uid velocity ÿeld (continuous phase). The particle-tracking model of the solid particles is based on the solution of the governing equation of each particle motion taking into consideration the e ect of particle rebound behaviour. Models of erosion were used to predict the erosion rate in mg/g. The e ect of Reynolds number and ow direction with respect to the gravity was investigated for three contraction geometries considering water ow in a carbon steel pipe. The results show that the in uence of the contraction ratio on local erosion is very signiÿcant. However, this in uence becomes insigniÿcant when the average erosion rates over the sudden contraction area are considered. The results also indicate the signiÿcant in uence of inlet velocity variations. The in uence of buoyancy is signiÿcant for the cases of low velocity of the continuous ow. A threshold velocity below which erosion may be neglected was indicated.

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Erosion of Metallic Plate by Solid Particles Entrained in a Liquid Jet

Cited by 62 publications

References 0 publications

Solid-particle erosion in the tube end of the tube sheet of a shell-and-tube heat exchanger

Solid-particle erosion in the tube end of the tube sheet of a shell-and-tube heat exchanger

Monitoring acoustic emission (AE) energy in slurry impingement using a new model for particle impact

Numerical calculations of erosion in an abrupt pipe contraction of different contraction ratios

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