Comparison of Vortex Core Oscillations in Cyclone Separators with Two Different Inlet Structures
State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Process Fluid Filtration and Separation, China University of Petroleum, Beijing 102249, China
Abstract：In order to investigate the influence of the inlet structure on the vortex core oscillation in the cyclone separator, Reynolds stress model (RSM) was used to simulate the gas flow of two cyclones with different inlet structures. The results showed that the tangential velocity presents an obvious non-axisymmetric phenomenon in the section, which was mainly characterized by the asymmetrical contour distribution. The position of the zero value did not coincide with the geometric center. The tangential velocity was large when the zero value was close to the side of the wall surface, and when the zero value was away from the wall surface, the tangential velocity was small. The internal eccentricity ratio |Δr|/D of the cyclone separator with tangential inlet was from 0.025 to 0.050, while the value of |Δr|/D of the cyclone with volute inlet was from 0.000 to 0.025, and the degree of the eccentricity was significantly reduced. Compared to the cyclone with tangential inlet, the average value of rational center offset axis values |Δx| and |Δy| of the volute cyclone in the cross section of 90-270°and 180-360°was also decreased. The average value of the eccentricity（|Δr| was reduced by 23.5% for the cyclone with volute inlet in respect to that with tangential inlet.
Gao Zhuwei,Wang Juan,Wang Jiangyun et al. Comparison of Vortex Core Oscillations in Cyclone Separators with Two Different Inlet Structures[J]. 化学反应工程与工艺, 2018, 34(4): 297-306.
