Impact Angle Dependence of Erosion by Solid Particle Impact for Metallic Materials

Int. J. Numer. Meth. Fluids

Said

et al. 2006

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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“…The previous experimental results [24,38] show that the erosive wear-rate exhibits power-law velocity dependence. The velocity exponent ranges from 1.9 to 2.5.…”

Section: The Erosion Modelmentioning

confidence: 99%

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

Int. J. Numer. Meth. Fluids

Said

et al. 2006

show abstract

“…The previous experimental results (Davies et al 1991;Isomoto et al 1999) show that the erosive wear-rate exhibits power-law velocity dependence. The velocity exponent ranges from 1.9 to 2.5.…”

Section: The Erosion Modelmentioning

confidence: 80%

Erosion in the tube entrance region of a shell and tube heat exchanger

Ben‐Mansour

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

et al. 2005

Purpose -In oil and gas industries, the presence of sand particles in produced oil and natural gas represents a major concern because of the associated erosive wear occurring in various flow passages. Erosion in the tube entrance region of a typical shell and tube heat exchanger is numerically predicted. Design/methodology/approach -The erosion rates are obtained for different flow rates and particle sizes assuming low particle concentration. The erosion prediction is based on using a mathematical model for simulating the fluid velocity field and another model for simulating the motion of solid particles. The fluid velocity (continuous phase) model is based on the solution of the time-averaged governing equations of 3D turbulent flow while the particle-tracking model is based on the solution of the governing equation of each particle motion taking into consideration the viscous and gravity forces as well as the effect of particle rebound behavior. Findings -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 effect 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 flow velocities. Originality/value -In oil and gas industries, the presence of sand particles in produced oil and natural gas represents a major concern because of the associated erosive wear occurring in various flow passages. The results indicate that erosion in shell and tube heat exchanger can be minimized through the control of velocity inlet to the header.

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“…Davies et al [31] and Isomoto et al [32] have shown that the erosive wear exhibits power-law velocity dependence with a velocity exponent ranging from 1.9 to 2.5. They have also shown that the influence of angle of impact on the erosion rate depends greatly on the type of material being brittle or ductile.…”

Section: Erosion and Penetration Calculationsmentioning

confidence: 98%

Erosion in the tube entrance region of an air-cooled heat exchanger

International Journal of Impact Engineering

Ben‐Mansour

et al. 2006