Effects of operating parameters on flow field in a turbo air classifier

2008 ◽  
Vol 21 (8) ◽  
pp. 598-604 ◽  
Author(s):  
Yongguo Feng ◽  
Jiaxiang Liu ◽  
Shengzhao Liu
Keyword(s):  
Flow Field ◽  
Operating Parameters ◽  
Air Classifier

Effects of fine particle outlet on performance and flow field of a centrifugal air classifier

2017 ◽  
Vol 117 ◽  
pp. 139-148 ◽  
Author(s):  
Zhanpeng Sun ◽  
Guogang Sun ◽  
Xiaonan Yang ◽  
Yi Yuan ◽  
Qinglian Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
Fine Particle ◽  
Air Classifier

Hydrodynamic Analysis of the Flow in a Rotary Lip Seal Using Flow Factors

2004 ◽  
Vol 126 (1) ◽  
pp. 156-161 ◽  
Author(s):  
Richard F. Salant ◽  
Ann H. Rocke
Keyword(s):  
Flow Field ◽  
Pressure Distribution ◽  
Reynolds Equation ◽  
Present Approach ◽  
Operating Parameters ◽  
Pumping Rate ◽  
Hydrodynamic Analysis ◽  
Lip Seal ◽  
Lubricating Film ◽  
Computationally Intensive

The flow field in the lubricating film of a rotary lip seal is analyzed numerically by solving the Reynolds equation with flow factors. The behavior of such a flow field is dominated by the asperities on the lip surface. Since previous analyses treated those asperities deterministically, they required very large computation times. The present approach is much less computationally intensive because the asperities are treated statistically. Since cavitation and asperity orientation play important roles, these are taken into account in the computation of the flow factors. Results of the analysis show how the operating parameters of the seal and the characteristics of the asperities affect such seal characteristics as the pressure distribution in the film, the pumping rate and the load support.

scholarly journals Computational and Experimental Study of the Effect of Operating Parameters on Classification Performance of Compound Hydrocyclone

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Jin Jiang ◽  
Rui Ying ◽  
Jingan Feng ◽  
Weibing Wang
Keyword(s):  
Flow Field ◽  
Design Method ◽  
Classification Performance ◽  
Operating Parameters ◽  
Separation Performance ◽  
Multiphase Model ◽  
Operating Condition ◽  
Inlet Velocity ◽  
Partition Size ◽  
Central Composite

Compound hydrocyclone is a kind of dynamic hydrocyclone also with the advantages of static hydrocyclone. In this investigation, the effect of operating parameters on separation performance of compound hydrocyclone is studied using both CFD technique and experimental method. The flow field of compound hydrocyclone was simulated by the RSM turbulence model; the particles with different size were simplified to 6 phases and simulated by the mixture multiphase model. The central composite design method was used to conduct the separation experiment of compound hydrocyclone. The results indicated that compound hydrocyclone can be used for finer particles separation and the flow field of compound hydrocyclone can still achieve a higher centrifugal force in lower inlet velocity. When the minimum partition size is required, the optimized operating condition of the compound hydrocyclone is v = 2.5 m/s, n = 1865 rpm, and c = 7.5%, while when the maximum partition size is required, the optimized operating condition is v = 2.5 m/s, n = 905 rpm, and c = 24.5%.

scholarly journals Numerical Simulation of a Flow Field in a Turbo Air Classifier and Optimization of the Process Parameters

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 237 ◽  
Author(s):  
Yun Zeng ◽  
Si Zhang ◽  
Yang Zhou ◽  
Meiqiu Li
Keyword(s):  
Flow Field ◽  
Process Parameters ◽  
Production Efficiency ◽  
Rapid Development ◽  
Engineering Application ◽  
Production Equipment ◽  
Powder Materials ◽  
Optimal Process ◽  
Air Classifier ◽  
Rotor Cage

Due to the rapid development of powder technology around the world, powder materials are being widely used in various fields, including metallurgy, the chemical industry, and petroleum. The turbo air classifier, as a powder production equipment, is one of the most important mechanical facilities in the industry today. In order to investigate the production efficiency of ultrafine powder and improve the classification performance in a turbo air classifier, two process parameters were optimized by analyzing the influence of the rotor cage speed and air velocity on the flow field. Numerical simulations using the ANSYS-Fluent Software, as well as material classification experiments, were implemented to verify the optimal process parameters. The simulation results provide many optimal process parameters. Several sets of the optimal process parameters were selected, and the product particle size distribution was used as the inspection index to conduct a material grading experiment. The experimental results demonstrate that the process parameters of the turbo air classifier with better classification efficiency for the products of barite and iron-ore powder were an 1800 rpm rotor cage speed and 8 m/s air inlet velocity. This research study provides theoretical guidance and engineering application value for air classifiers.

Effects of operating parameters on the flow field in slab continuous casting molds with narrow widths

2021 ◽  
Vol 28 (2) ◽  
pp. 238-248
Author(s):  
Tao Zhang ◽  
Jian Yang ◽  
Gang-jun Xu ◽  
Hong-jun Liu ◽  
Jun-jun Zhou ◽  
...  
Keyword(s):  
Flow Field ◽  
Continuous Casting ◽  
Operating Parameters ◽  
Slab Continuous Casting

Study of Operating Parameters’ Impact on Separation Performance of Cyclone Separator

2011 ◽  
Vol 422 ◽  
pp. 794-798
Author(s):  
Xue Ping Wang ◽  
Ying Zhang ◽  
Ju Guang Xue ◽  
Zhen Wei Zhang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Flow Velocity ◽  
Turbulence Model ◽  
Separation Efficiency ◽  
Operating Parameters ◽  
Separation Performance ◽  
Cyclone Separator ◽  
High Concentration ◽  
Secondary Particles

The numerical simulation can be obtained by taking advantage of turbulence model of Fluent to study the gas-solid flow field of cyclone separator. The pressure of the cyclone drops increases with the enhancement of the inlet flow velocity, and the increase amplitude can become larger and larger. The separation efficiency of the cyclone enhances gradually as the increase of the flow. The increase amplitude of small and secondary particles is much lager compared with the increase amplitude of big ones. The overall separation efficiency can strengthen gradually with increasing of particles concentration as well as the each part’s efficiency. But the separation efficiency will stay in stable level when the concentration reaches a certain value with the big particles in the low concentration and small ones in a relatively high concentration.

scholarly journals Effects of Operating Parameters on the Cut Size of Turbo Air Classifier for Particle Size Classification of SAC305 Lead-Free Solder Powder

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 427 ◽  
Author(s):  
Nipon Denmud ◽  
Kradsanai Baite ◽  
Thawatchai Plookphol ◽  
Somjai Janudom
Keyword(s):  
Feed Rate ◽  
Operating Parameters ◽  
Rotor Speed ◽  
Air Velocity ◽  
Inlet Velocity ◽  
Air Inlet ◽  
Multiple Variable ◽  
Air Classifier ◽  
Free Solder

In the present study, the effects of operating parameters, namely, rotor speed, feed rate, and inlet air velocity, on the cut diameter of a cage-type separator were studied. The design of experiments (DOE) method was used to investigate the relationship between the operating parameters and the cut size. The experimental results were statistically analyzed using MINITAB 16 software. Both the rotor speed and air inlet velocity had significant main effects on the cut size. The feed rate was also significant but had a weak effect with respect to the rotor speed and inlet air velocity effects. The cut size decreased with an increase in rotor speed and increased with an increase in air inlet velocity. However, the cut size slightly decreased with an increase in feed rate. An empirical multiple-variable linear model for predicting the cut size of the classification was created and presented. The results derived from the statistical analysis were in good agreement with those from the experiments, additionally extended from the DOE. The optimal conditions for classification of SAC305 powder with size range 25–40 μm were obtained when the turbo air classifier was operated at rotor speed 406 RPM, the feed rate 4 kg/h, and the air velocity 5 m/s. The smallest cut size of the classifier was about 27.8 μm.

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