Analysis of Flow Field in Vertical Roller Mill Chamber Based on Turbulent Models

Sun, Ye; Ze, Xiangbo; Yang, Xuefeng; Chao-yang, Zhang; Zhou, Yiqi

doi:10.1109/esiat.2009.162

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…In particular, the quantity of calculation is huge, and the computation speed is very slow. For complex multi-phase flow, the convergence of Euler-Lagrange model is often difficult to be realized [7]. The mixture model including the intense coupling multi-phase flow with isotropy or anisotropy assumes that the local flow field is balanced in a short spatial scale, and can be used to simulate a multi-phase coupling flow field with different flow speeds.…”

Section: Analysis Of Multi-phase Flow Numerical Modelsmentioning

confidence: 99%

Analysis of gas—solid coupling flow field in a vertical roller mill under different gas fluxes

Sun

Wang

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part E:

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To understand the powder transportation in HRM4800 vertical roller mill, the mixture multi-phase flow model and the Reynolds stress equation vortex viscosity model were employed to simulate the internal special multi-phase flow of the chamber. The gas flux effect on the gas-solid coupling flow field is also considered in this study. The results show that there is a strong three-dimensional rotation flow field in the powder transportation due to the rotation of the table and rollers. Significant turbulent vortexes in the table-roller flow field have been observed and that field is the main gas-solid coupling flow field of the vertical roller mill. With the increase of gas flux, there is a visible increase of velocity and pressure drop in the multi-phase flow field resulting in improved powder transportation. The phenomena of turbulent pulsation and vortexes under different gas fluxes show that there are restriction problems in the approach of enhancing the efficiency of the vertical roller mill through the increase of gas flux. The studies of gas-solid flow velocity and pressure indicate that there are random characters in the process of turbulent parameters' change and transfer. The results indicate that the structure of the chamber flow model has great influence on the gas-powder flow field, and the optimization design of the vertical roller mill could be achieved with further research work.

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Section: Analysis Of Multi-phase Flow Numerical Modelsmentioning

confidence: 99%

Analysis of gas—solid coupling flow field in a vertical roller mill under different gas fluxes

Sun

Wang

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part E:

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show abstract

“…Many scholars have studied the flow field characteristics of vertical roller mill. Sun et al [7] analyzed the three-dimensional flow of the chamber using the standard k-epsilon turbulent model, RNG k-epsilon turbulent model, and Reynolds stress equation model (RSM). e results show that the high-pressure region improves the transportation efficiency of powder.…”

Section: Introductionmentioning

confidence: 99%

Effects of Blade Parameters on the Flow Field and Classification Performance of the Vertical Roller Mill via Numerical Investigations

Liu

Chen

Zhang³

et al. 2020

Mathematical Problems in Engineering

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The vertical roller mill is an important crushing and grading screening device widely used in many industries. Its classification efficiency and the pressure difference determine the entire producing capacity and power consumption, respectively, which makes them the two key indicators describing the mill performance. Based on the DPM (Discrete Phase Model) and continuous phase coupling model, the flow field characteristics in the vertical roller mill including the velocity and pressure fields and the discrete phase distributions had been analyzed. The influence of blade parameters like the shape, number, and rotating speed on the flow field and classification performance had also been comprehensively explored. The numerical simulations showed that there are vortices in many zones in the mill and the blades are of great significance to the mill performance. The blade IV not only results in high classification efficiency but also reduces effectively the pressure difference in the separator and also the whole machine. The conclusions of the flow field analysis and the blade effects on the classification efficiency and the pressure difference could guide designing and optimizing the equipment structure and the milling process, which is of great importance to obtain better overall performance of the vertical roller mill.

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Research on slag grinding process control

Duan

Wang

et al. 2015

2015 34th Chinese Control Conference (CCC)

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Analysis of Flow Field in Vertical Roller Mill Chamber Based on Turbulent Models

Cited by 4 publications

References 2 publications

Analysis of gas—solid coupling flow field in a vertical roller mill under different gas fluxes

Analysis of gas—solid coupling flow field in a vertical roller mill under different gas fluxes

Effects of Blade Parameters on the Flow Field and Classification Performance of the Vertical Roller Mill via Numerical Investigations

Research on slag grinding process control

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