兰州大学机构库 >资源环境学院
Numerical study of vortex eccentricity in a gas cyclone
Dong, Sijie1,2; Jiang, YC(姜云超)1; Jin, Ruizhi2; Dong, Kejun2; Wang, B(王博)1
2020
Source PublicationAPPLIED MATHEMATICAL MODELLING   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN0307-904X
EISSN1872-8480
Volume80Pages:683-701
page numbers19
AbstractThis paper presents a numerical study of the vortex eccentricity in a gas cyclone and its effect on the performance of the cyclone. The gas flow in the cyclone was modeled as an unsteady flow by the Navier–Stokes equations with the Reynolds Stress Model (RSM) as the turbulence model. The particles were modelled by the Lagrangian particle tracking (LPT) approach in an unsteady gas flow. Gas cyclones with the same dimensions and total flow rates but different numbers of inlets were simulated with the inlet velocity varying from 12 to 20 m/s. The vortex eccentricities in different cases were analyzed in terms of radial deviation and angular deviation. In addition, the frequency of the precessing vortex core (PVC) was analyzed by the fast Fourier transform (FFT). The results show that the vortex center in the single inlet cyclone has a great eccentricity and its precession center is also different from the geometric center, which reduces the particle collection efficiency. The increase in the symmetry of the inlet causes only a very small increase in the pressure drop in the simulated cases, but it can significantly reduce the vortex eccentricity, particularly by eliminating the eccentricity of the PVC center. The improvement of the vortex eccentricity can generally increase the collection efficiency for particles greater than 2.0 µm. The increase of the collection efficiency is mainly because the symmetrical vortex can restrain the short-circuiting flow of particles. The results can improve the understanding of the vortex flow in gas cyclones which may guide the optimization of gas cyclones.
© 2019
KeywordGas cyclone Computational fluid dynamics Vortex eccentricity Precessing vortex core Cyclone performance Short-circuiting particles
PublisherELSEVIER SCIENCE INC
DOI10.1016/j.apm.2019.11.024
Indexed BySCIE ; CPCI ; CPCI-S ; EI
Language英语
Funding Project[WSU26613] ; National Outstanding Youth Science Fund Project of National Natural Science Foundation of China[51708268] ; Key Science and Technology Foundation of Gansu Province[18YF1GA103-2018] ; Fundamental Research Funds for the Central Universities[lzujbky-2017-it97]
WOS Research AreaEngineering ; Mathematics ; Mechanics
WOS SubjectEngineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications ; Mechanics
WOS IDWOS:000517665300037
PublisherElsevier Inc.
EI Accession Number20195207922573
EI KeywordsComputational fluid dynamics ; Efficiency ; Fast Fourier transforms ; Flow of gases ; Gases ; Navier Stokes equations ; Reynolds number ; Storms ; Turbulence models ; Vorticity
EI Classification NumberPrecipitation:443.3 ; Fluid Flow, General:631.1 ; Gas Dynamics:631.1.2 ; Computer Applications:723.5 ; Production Engineering:913.1 ; Calculus:921.2 ; Mathematical Transformations:921.3
Original Document TypeJournal article (JA)
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/418018
Collection资源环境学院
Corresponding AuthorDong, Kejun
Affiliation
1.Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Engineering Research Center of Fine Particle Pollution Control Technology and Equipment, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China
2.Center for Infrastructure Engineering, Western Sydney University, Locked Bag 1797, Penrith; NSW; 2751, Australia
First Author AffilicationCollege of Earth Environmental Sciences
First Signature AffilicationCollege of Earth Environmental Sciences
Recommended Citation
GB/T 7714
Dong, Sijie,Jiang, Yunchao,Jin, Ruizhi,et al. Numerical study of vortex eccentricity in a gas cyclone[J]. APPLIED MATHEMATICAL MODELLING,2020,80:683-701.
APA Dong, Sijie,Jiang, Yunchao,Jin, Ruizhi,Dong, Kejun,&Wang, Bo.(2020).Numerical study of vortex eccentricity in a gas cyclone.APPLIED MATHEMATICAL MODELLING,80,683-701.
MLA Dong, Sijie,et al."Numerical study of vortex eccentricity in a gas cyclone".APPLIED MATHEMATICAL MODELLING 80(2020):683-701.
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