Abstract
Present work is devoted to investigation of the slurry erosion wear in a 90° elbow by using commercial Computational fluid dynamics (CFD) code FLUENT. Discrete phase erosion wear model was used to predict erosion in 90° elbow by solving the governing equations through Euler-Lagrange scheme. Particle tracking was considered by using standard k-ε turbulence scheme for the flow of bottom ash slurry. Erosion wear in elbow was investigated along with velocity distribution and turbulence intensity. The radius-to-diameter (r/D) ratio was taken as 1.5. Results show that erosion rate increases with increase in velocity. Present numerical simulation model holds close agreement with previous studies. Distorted patterns appeared at low velocities. The V-shape pattern appeared on the outer wall of elbow at high velocities. The low velocity region occurs around circumference of elbow wall at outer wall of elbow due to stimulation of the drag forces near the wall region.
Highlights
Erosion wear is a commonly observed problem in many industries such as thermal power plants, mining industry, chemical industry, etc. [1,2,3,4,5]
The erosion wear problem is observed in ash disposal systems
Slurry erosion wear problem occurs due to collisions of solid particles that travel in a liquid while striking to target
Summary
Erosion wear is a commonly observed problem in many industries such as thermal power plants, mining industry, chemical industry, etc. [1,2,3,4,5]. Slurry erosion wear problem occurs due to collisions of solid particles that travel in a liquid while striking to target. Due to such problem, the pipeline circuit undergo serious damage at different components tees, elbows or reducers [3]. Many researchers had reported the slurry erosion wear investigation basing on an influence of various parameters such as fluid-flow behaviour, design and geometries, properties of pipeline material, a condition of the impact made by particles, particle movements, etc. Researchers [13, 14] had reported that investigation based on pilot plant experimentation of slurry erosion wear are time consuming and expensive. Particle tracking was performed by using standard k–ε turbulence scheme for the flow of bottom ash slurry
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