Solid particle erosion is a mechanical process that removes material by the impact of solid particles entrained in the flow. Erosion is a leading cause of failure of oil and gas pipelines and fittings in fluid handling industries. Different approaches have been used to control or minimize damage caused by erosion in particulated gas-solid or liquid-solid flows. S-bend geometry is widely used in different fluid handling equipment that may be susceptible to erosion damage. The results of a computational fluid dynamic (CFD) simulation of diluted gas-solid and liquid-solid flows in an S-bend are presented in this paper. In addition to particle impact velocity, the bend radius may have significant influence on the magnitude and the location of erosion. CFD analysis was performed at three different air velocities (15.24 m/s-45.72 m/s) and three different water velocities (0.1 m/s-10 m/s) with entrained solid particles. The particle sizes used in the analysis range between 50 and 300 microns. Maximum erosion was observed in water with 10 m/s, 250-micron particle size, and a ratio of 3.5. The location of maximum erosion was observed in water with 10 m/s, 300-micron particle size, and a ratio of 3.5. Comparison of CFD results with available literature data showed reasonable and good agreement.
Solid particle erosion is a micromechanical process that removes material from the surface. Erosion is a leading cause of failure in fluid handling equipment such as pumps and pipes. An investigation was conducted using an S-bend geometry with 12.7 mm inside diameter, r/D ratio of 1.5 with three different air velocities and two different particle sizes. This paper presents the preliminary results of an investigation to determine the location of erosion for a wide range of conditions. The experimental results showed the location of maximum erosion at 29–42 deg from the inlet at 45.72 m/s air velocity with 300 μm particle sizes.
Solid particle erosion is a process that removes material from the inner surface of flow handling devices by repeated impact of entrained particles in the flow. Erosion is a leading cause of unpredicted and premature failure within different industrial equipment such as pumps, pipes, valves and fittings. Understanding the magnitude and location of erosion in the geometry is essential to the prevention of failure. S-bend geometry is used to redirect flows in automotive, chemical processing, oil, and food handling industries. An investigation was conducted using both CFD and experimentation methods to identify the location of maximum erosion. Three different s-bend geometries with 12.7 mm inside diameter and r/D ratios of 1.5, 2.5, and 3.5 were used in the current study. Investigations were performed at three different water velocities each with six different particle sizes ranging from 50 to 300 microns. Due to multiple constraints associated with the test loop, one s-bend geometry was used in the experiment with 12.7 mm inside diameter and an r/D ratio of 1.5. CFD analysis and experimental results showed reasonably good agreement.
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