PARAMETRIC NUMERICAL SIMULATION OF A DUST COLLECTOR-CLASSIFIER WITH COAXIAL TUBES FOR CAPTURING FINE PARTICLES
Authors:
1.
Kazan State Energy University
2.
FGBOU VO "Kazanskiy gosudarstvennyy energeticheskiy universitet"
(Teoreticheskie osnovy teplotehniki, Assistent)
Kazan State Power Engineering University
from 01.01.2013 to 01.01.2025
Kazan, Kazan, Russian Federation
Kazan State Power Engineering University
from 01.01.2013 to 01.01.2025
Kazan, Kazan, Russian Federation
3.
Kazanskiy gosudarstvennyy energeticheskiy universitet
(ATPP, zaveduyuschiy kafedroy)
from 01.01.2015 until now
Russian Federation
from 01.01.2015 until now
Russian Federation
4.
Kazan State Energy University
5.
Kazan State Energy University
Type:
Article
Pages:
from 144
to 150
Status:
Published
Received:
15.12.2025
Accepted:
18.04.2026
Published:
05.05.2026
Language:
Russian
Keywords:
AIR CLASSIFICATION, FRACTIONAL EFFICIENCY, HYDRAULIC RESISTANCE, NUMERICAL MODELING, DUST COLLECTOR-CLASSIFIER
Funding:
Rabota vypolnena v ramkah granta Akademii Nauk Respubliki Tatarstan na podderzhku programm razvitiya peredovyh inzhenernyh shkol respublikanskogo znacheniya «TurboPISh», soglashenie 1RPISh ot 19.12.2025g.
Abstract:
Under increasingly stringent environmental regulations on emissions of fine particulate matter and the growing share of technological operations involving the handling of dispersed materials, energy-efficient methods of dry gas cleaning and particle classification are becoming particularly important. An additional driver of relevance is the need to achieve high separation selectivity at minimal hydraulic resistance, which directly determines the operational and energy costs of industrial systems. This study presents a numerical investigation of an inertial-vortex classifier with coaxially arranged tubes, designed for the capture and separation of fine particles from dust-laden gas flows. The proposed device is of particular practical interest for the fractionation of metallic powders used in additive manufacturing of gas turbine components, where particle size distribution has a significant impact on process stability and the reproducibility of the mechanical and functional properties of printed parts. The objective of the work is to assess the influence of the ratios between the inlet cross-sectional area, the inter-tube annular space, and the inlet area of the tube system on the fractional capture efficiency and hydraulic resistance of the classifier. Numerical simulations were performed in the ANSYS Fluent software package using a three-dimensional formulation, the k-ω SST turbulence model, and a Lagrangian description of the dispersed phase based on the Discrete Phase Model (DPM). A parametric study was carried out by varying the ratios of the characteristic areas of the inlet section, the annular inter-tube region, and the fine-particle outlet system. The results demonstrate that changes in the basic layout and individual geometric parameters enable targeted control of the sharp rise region of fractional efficiency within the particle size range of 5-55 μm, as well as effective regulation of pressure losses over a wide range. It is established that high capture efficiency for fine particles can be achieved without structural complication or the use of moving parts, solely through geometric tuning of the flow path, confirming the prospects of the proposed classifier for dry gas cleaning and classification of dispersed materials.
Under increasingly stringent environmental regulations on emissions of fine particulate matter and the growing share of technological operations involving the handling of dispersed materials, energy-efficient methods of dry gas cleaning and particle classification are becoming particularly important. An additional driver of relevance is the need to achieve high separation selectivity at minimal hydraulic resistance, which directly determines the operational and energy costs of industrial systems. This study presents a numerical investigation of an inertial-vortex classifier with coaxially arranged tubes, designed for the capture and separation of fine particles from dust-laden gas flows. The proposed device is of particular practical interest for the fractionation of metallic powders used in additive manufacturing of gas turbine components, where particle size distribution has a significant impact on process stability and the reproducibility of the mechanical and functional properties of printed parts. The objective of the work is to assess the influence of the ratios between the inlet cross-sectional area, the inter-tube annular space, and the inlet area of the tube system on the fractional capture efficiency and hydraulic resistance of the classifier. Numerical simulations were performed in the ANSYS Fluent software package using a three-dimensional formulation, the k-ω SST turbulence model, and a Lagrangian description of the dispersed phase based on the Discrete Phase Model (DPM). A parametric study was carried out by varying the ratios of the characteristic areas of the inlet section, the annular inter-tube region, and the fine-particle outlet system. The results demonstrate that changes in the basic layout and individual geometric parameters enable targeted control of the sharp rise region of fractional efficiency within the particle size range of 5-55 μm, as well as effective regulation of pressure losses over a wide range. It is established that high capture efficiency for fine particles can be achieved without structural complication or the use of moving parts, solely through geometric tuning of the flow path, confirming the prospects of the proposed classifier for dry gas cleaning and classification of dispersed materials.
Keywords:
AIR CLASSIFICATION, FRACTIONAL EFFICIENCY, HYDRAULIC RESISTANCE, NUMERICAL MODELING, DUST COLLECTOR-CLASSIFIER
AIR CLASSIFICATION, FRACTIONAL EFFICIENCY, HYDRAULIC RESISTANCE, NUMERICAL MODELING, DUST COLLECTOR-CLASSIFIER
