CFD modeling and analysis of the fish-hook effect on the rotor separator's efficiency

Guizani, Rim; Mokni, Ines; Mhiri, Hatem; Bournot, Philippe

doi:10.1016/j.powtec.2014.05.020

Cited by 48 publications

(24 citation statements)

References 27 publications

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“…The numerical simulations via CFD modeling [7][8][9][10][11][12][13][14] revealed that the performance of an air classifier is strongly influenced by the classifier configuration, structural of blades, and operating parameters. Some researchers [e.g., 4,[15][16][17] theoretically analyzed the performance of the classifier and presented some correlations to predict η and d 50 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

et al. 2015

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“…So, the DPM is a good choice to solve this gas-solid two-phase flow problem (Ansari, Goharrizi, Jafari, & Abolpour, 2015;Kosinski & Hoffmann, 2007;Pankajakshan, Mitchell, & Taylor, 2011;Zhou, Mo, & Cen, 2011). Zhou, Flamant, Gauthier, and Lu (2004), Wan, Peng, Xie, Zhang, and Huang (2013), Ma, Liu, Li, Huang, and Su (2015), Liu et al (2015), Oh, Choi, and Kim (2015), Guizani, Mokni, Mhiri, and Bournot (2014), Baghdar Hosseini, Haghighi Khoshkhoo, and Javadi Malabad (2017), Xie et al (2017) and Gao (2018a, 2018b) used the DPM to simulate the motion of particles in the airflow, and the simulation results were in accord to their experiment results. Therefore, it is reasonable to use the DPM method to research the movement of dust particles in the settling chamber.…”

Section: Airflow Field Dynamics Modelmentioning

confidence: 99%

Study on the key structure parameters of a gravity settling chamber based on a flow field simulation

Liu

Zhang

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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A gravity settling chamber plays an important role in improving the effect of the dust removal when it is selected as a dust collector in a pneumatic cleaning system for cleaning a subway tunnel. The settling rate and the indexes evaluating the secondary blowing are studied to assess the effect of the dust removal in this paper. Regarding the length of the settling chamber, the height of the inlet duct, and the diameter and height of the outlet duct as the variables of the key structures, a flow field simulation analysis of the gravity settling chamber with different heights of the dust accumulation is carried out, then the key structure parameters are optimized by means of the experimental method of uniform design. Finally, the settling chamber with an excellent dust removal effect is obtained. Major conclusions can be drawn as follows. (1) The maximum velocity and the mean velocity ratio of the airflow near a dust accumulation surface are important evaluation indexes for judging the secondary blowing. (2) The maximum velocity near a dust accumulation surface usually doesn't appear on the vertical plane through the axis of the inlet duct or the outlet duct. (3) An excellent settling effect can be ensured during the whole cleaning process only when the maximum design height of the dust-accumulation surface is considered as a key working condition. (4) An excellent settling effect can be realized if the settling chamber without any filtering device and affiliated baffle structure are long enough. (5) The secondary blowing can be avoided if the inlet and outlet of the setting chamber are far away from the dust-accumulation surface. This study has a good guiding significance for the design of gravity settling chamber.

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“…He calculated that the intensity of the vortex is smallest when the tangential velocity of the exterior of the rotor blade and tangential velocity of the air flow in the rotor exterior edge are approximately equal. Guizani et al [14] also focused on the vortex in the classifier. He identified that it is not the vortex which has a negative impact on the classification performance, but it is its breakdown.…”

Section: Forced Vortex Formation In Blade Passagewaymentioning

confidence: 99%

“…Liu et al [13] measured the axial velocity of the gas flow in a gas cyclone by the 2D-PIV and 3D-PIV. Guizani et al [14] successfully used the pitot tube to measure the air inlet velocity in the cross section of the pipe's air inlet. The detailed investigation and study of flow structures in the proximity of rotor blades and in the blade passageway provides valuable information and insight into the particle classification process.…”

Section: Introductionmentioning

confidence: 99%

Parameters Effecting Forced Vortex Formation in Blade Passageway of Dynamic Air Classifier

2017

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Abstract. Air classification of particulate materials is a method of classifying particles into coarse and fine fractions based on their size, density or shape. The performance of the rotor air classifier is affected by operating parameters which include the classifier rotor speed, air inlet velocity and material feed rate. Effects of operating and structural parameters on turbulent flow field patterns inside of a dynamic air classifier are investigated. Increasing the computing power, together with new turbulence models and approaches to simulate complex fully turbulent problems by solving Navier-Stokes equations allows studying and capturing smaller flow structures and properties more accurately. Velocity vector maps for varying operating parameters are studied by means of numerical simulations. The experimental section includes a visualization of flow patterns and velocity vector maps in the rotor region by the use of the particle image velocimetry (PIV). Results are compared and discussed.

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CFD modeling and analysis of the fish-hook effect on the rotor separator's efficiency

Cited by 48 publications

References 27 publications

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

Experimental study on velocity field between two adjacent blades and gas–solid separation of a turbo air classifier

Study on the key structure parameters of a gravity settling chamber based on a flow field simulation

Parameters Effecting Forced Vortex Formation in Blade Passageway of Dynamic Air Classifier

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