Effect of a new pattern of surface roughness on flow field and erosion rate of a cyclone

Ehsan Dehdarinejad; Morteza Bayareh

doi:10.1515/ijcre-2022-0064

Article

Effect of a new pattern of surface roughness on flow field and erosion rate of a cyclone

Ehsan Dehdarinejad and Morteza Bayareh

Published/Copyright: July 18, 2022

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From the journal International Journal of Chemical Reactor Engineering Volume 21 Issue 2

Abstract

This paper evaluates the impact of a special design of non-uniform surface roughness on the operating parameters of a gas–solid cyclone numerically. The cyclone surface is divided into 32 separate rings with different roughness heights when the roughness height varies from 0.2 to 3 mm. The results show that the tangential velocity is reduced and the axial velocity is enhanced by increasing the height of non-uniform roughness. It is observed that the cyclone with smooth walls can collect 7 μm solid particles while 3.7 and 2.77 μm particles can be separated by one-inlet and two-inlet cyclones, respectively. For the cut-off size diameter of d₅₀, the one-inlet cyclone with smooth walls can collect the particles with a diameter of 1.24 µm, while the cyclone with R_Nu = 0.2, 0.5, 1, 2, and 3 mm can collect 1.3, 1.6, 1.8, 0.83, and 1.88 µm particles, respectively. The results demonstrate that the erosion rate decreases with the roughness and this reduction is larger for the one-inlet cyclone.

Keywords: collection efficiency; cyclone separator; erosion rate; pressure drop; roughness

Corresponding author: Morteza Bayareh, Department of Mechanical Engineering, Shahrekord University, Shahrekord, Iran, E-mail: m.bayareh@sku.ac.ir

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2022-03-28

Accepted: 2022-07-08

Published Online: 2022-07-18

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Articles in the same Issue

https://doi.org/10.1515/ijcre-2022-0064

Keywords for this article

collection efficiency; cyclone separator; erosion rate; pressure drop; roughness