Numerical simulation of the effects of the internal components on the uniformity of the flow field in a tubular separator

Li, Quan; Wang, Zongyong; Lin, Ruting; Li, Shuai; Wang, Chao

doi:10.1007/s12206-022-1013-x

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…The uniformity index is an evaluation standard for flow field velocity uniformity [29][30][31][32][33][34]. The calculation formula is:…”

Section: Analysis Of Flow Field Uniformity Inside Test Unitmentioning

confidence: 99%

Research and application of bag filter system for railway ballast bed coal suction vehicles: An optimization and application study

Lu,

Guo,

Zhao

2024

PLoS ONE

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The current bag filter system used by railway ballast bed coal suction vehicles for cleaning coal dust from railway tunnels has low operational efficiency and generates significant volumes of dust. This paper describes a simulation test unit designed to enhance the dust removal performance in railway tunnels. The flow field inside the simulation test unit is investigated under different operating conditions through numerical simulations, and the variations in air volume and working resistance, total dust collection efficiency, and optimal operating parameters of a pulse cleaning system are identified through a series of experiments. The numerical results show that the pulse cleaning system does not significantly affect the uniformity of the flow field distribution at the bottom of the filter cartridge during the process of operation. The experimental research indicates that the simulation test unit satisfies the design requirements, achieving an average total dust removal efficiency of 99.93%. A field application shows that the total dust mass concentration at the operator position can be reduced from 335.8 mg∙m−3 to 4.2 mg∙m−3, effectively improving the operating environment within the tunnel.

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“…The uniformity index is an evaluation standard for flow field velocity uniformity [29][30][31][32][33][34]. The calculation formula is:…”

Section: Analysis Of Flow Field Uniformity Inside Test Unitmentioning

confidence: 99%

Research and application of bag filter system for railway ballast bed coal suction vehicles: An optimization and application study

Lu,

Guo,

Zhao

2024

PLoS ONE

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“…Based on the principles of constructing a conglomerate model in Section 2, conglomerate models with the number of conglomerates of 9,18,27,37,46,54,65,71, and 79 are constructed to represent conglomerate contents of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, and 90%, respectively, and their stress-strain curves are shown in Figure 8a. The results of physical and numerical simulation experiments are presented in Figure 8b, which show that the compressive strength of the conglomerate decreases with increasing gravel content.…”

Section: Effect Of Gravel Content On Mechanical Behaviormentioning

confidence: 99%

“…The current research shows that the mechanical properties of conglomerates are affected by factors such as gravel particle size, gravel content, cementation between gravel and cement, and the support mode of the conglomerate [27,28]. However, the influence of specific gravel shape and spatial position has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Mechanical Properties and Fracture Characteristics of Conglomerates Based on Mohr–Coulomb Criteria

Liu,

Shen,

Meng

et al. 2023

JMSE

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Gravel is one of the main factors affecting the mechanical properties of conglomerates, which plays a decisive role in crack propagation. In this paper, taking the conglomerate of the Baikouquan Formation in Mahu Sag of Xinjiang as the research object, a three-dimensional model of the conglomerate is constructed by the discrete element numerical simulation method, and the triaxial compression experiment under different confining pressures is simulated. The mechanical properties and fracture morphology of conglomerate are analyzed with gravel content as a variable and verified by laboratory tests. In this simulation, with the increase of gravel content, the compressive strength of the conglomerate decreases, angle of internal friction decreases, and the fractures show different forms. The results show that the gravel morphology, spatial location, and gravel content have an impact on the mechanical properties of the conglomerate. The gravel content affects the formation process of the dominant fracture surface by controlling the distance between gravels so as to control the internal friction angle and it is the main controlling factor for the mechanical properties of the conglomerate. Gravel cracks initiate at the edge of gravel. Stress controls the formation of main cracks under low gravel content, and the influence of gravels under high gravel content makes cracks more discrete and complex.

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“…Currently, the steady-state numerical simulation method is used in studying the distribution of spontaneous combustion danger (SCD) areas in goafs (The area with the possibility of spontaneous combustion in the goaf) [5][6][7][8][9][10]. The method assumes that the space and porosity distribution of the goaf do not change with increasing goaf strike length.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal evolution law of gas-temperature coupling field in “110 method” goaf and prevention of spontaneous combustion

Wei,

Fang,

et al. 2023

PLoS ONE

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To investigate the distribution characteristics of spontaneous combustion disaster (SCD) zones in the goaf of "110" mining method with U + L ventilation system and formulate corresponding fire prevention measures, enclosed coal oxidation experiments were carried out to measure the oxidation characteristics of Dongrong Coal Mine bituminous coal sample. A coupled 3DEC-CFD (3 dimensional Distinct Element Code) model was established. The 3D transient distribution characteristics of SCD zones in the “110” mining goaf under U+L ventilation condition were analyzed. Nitrogen injection in the tailgate was proposed for coal spontaneous combustion prevention. The results show that air leakage changed the distribution of oxygen and temperature fields in the “110” goaf, causing the region 20~60 m parallel to the retained roadway to remain in the oxidation zone for spontaneous combustion. As the working face advanced, the area change curve of SCD zones in the “110” goaf exhibited a “double inflection point” pattern. Eliminating the “retained roadway oxidation zone” can effectively reduce the spontaneous combustion risks in the “110” goaf and ensure mining safety. This study enriches the mechanisms of coal spontaneous combustion.

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Numerical simulation of the effects of the internal components on the uniformity of the flow field in a tubular separator

Cited by 4 publications

References 12 publications

Research and application of bag filter system for railway ballast bed coal suction vehicles: An optimization and application study

Research and application of bag filter system for railway ballast bed coal suction vehicles: An optimization and application study

Experimental Study of Mechanical Properties and Fracture Characteristics of Conglomerates Based on Mohr–Coulomb Criteria

Spatio-temporal evolution law of gas-temperature coupling field in “110 method” goaf and prevention of spontaneous combustion

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