Cyclone dimensionless pressure drop, cut size, and separation slope: One dimensionless number (Reynolds) to rule them all (Open Access)--颗粒学报PARTICUOLOGY

Misiulia, D., Lidén, G., & Antonyuk, S. (2024). Cyclone dimensionless pressure drop, cut size, and separation slope: One dimensionless number (Reynolds) to rule them all. Particuology, 95, 235-251. https://doi.org/10.1016/j.partic.2024.10.001

Cyclone dimensionless pressure drop, cut size, and separation slope: One dimensionless number (Reynolds) to rule them all (Open Access)

Dzmitry Misiulia^{a *}, Göran Lidén^b, Sergiy Antonyuk^a

a Institute of Particle Process Engineering, University of Kaiserslautern-Landau (RPTU), 67663, Kaiserslautern, Germany
b Department of Environmental Science, Stockholm University, 106 91, Stockholm, Sweden

10.1016/j.partic.2024.10.001

Volume 95, December 2024, Pages 235-251

Received 18 August 2024, Revised 25 September 2024, Accepted 7 October 2024, Available online 13 October 2024, Version of Record 22 October 2024.

E-mail: dzmitry.misiulia@mv.rptu.de

Highlights

• Cyclone performance have been investigated at a wide range of Reynolds numbers.

• Reynolds number rules all dimensionless performance parameters of the cyclone.

• Five critical Reynolds numbers have been determined.

• Two different dimensionless cut-sizes, based on the Stokes number $\sqrt {{Stk}_{50}}$ and ψ₅₀, were analysed.

Abstract

The flow field and performance characteristics of the high-efficiency Stairmand cyclone have been computationally investigated at a wide range of Reynolds numbers Re_out = 84 − 252876 by varying the cyclone diameter, inlet velocity, operating temperature and pressure using the LES simulations. The effects of these parameters on the dimensionless cyclone performance characteristics (Euler number, square root of Stokes number and slope of the transformed grade efficiency curve) and dimensionless lip flow and lip velocity have been revealed. Five critical Reynolds numbers which correspond to the transition between different regimes and sub-regimes have been determined. All three dimensionless cyclone performance characteristics and two lip flow characteristics are ruled by the Reynolds number.

Graphical abstract

Keywords

Cyclone; Pressure drop; Cut size; Separation slope; Large eddy simulation

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