Study of turbulent flow through a fan
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Date
2025-01-07
Authors
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Publisher
Mohamed Boudiaf University - M’sila
Abstract
Particle-laden flows are crucial for specific industrial applications but can have undesirable
consequences, especially in industries like cement manufacturing that heavily
rely on centrifugal fans. Operating under demanding conditions with a notable load
of erodent solid particles poses challenges for these fans. Despite their widespread use,
erosion in various fan types remains insufficiently explored. This thesis focuses on investigating
the erosion process of an induced cement mill fan (FN-280). In pursuit of
this objective, Unsteady three-dimensional numerical simulations using the Eulerian-
Lagrangian approach were conducted to predict the fan’s aerodynamic characteristics
and particle dispersion. Results are compared with experimental data and on-site inspections
to assess the simulation’s effectiveness in predicting the fan’s performance
and erosion patterns. Additionally, a thesis section examines how altering the number
of blades and the blade’s outlet angle affects overall performance and erosion patterns.
The numerical fan’s performance curve closely aligns with experimental data, validating
the model’s reliability. Findings underscore the model’s ability to accurately
replicate actual erosion patterns, emphasizing the substantial influence of particle size,
flow conditions, and particle load on patterns and erosion rates. It is shown that increasing
the blade outlet angle significantly intensifies erosion on the blade’s pressure
side, with the primary factor driving higher erosion rates being the interplay between
particle impact angle and frequency. Adjusting the blade count has minimal impact
on erosion patterns on the blade pressure side compared to changing the blade outlet
angle, but a noticeable trend emerges with fewer blades, resulting in more pronounced
erosion rates. This is suggested to be attributed to the higher local impact frequency
on blades featuring fewer blades.