Study on the Method for CFX Numerical Simulation of Flow Field in Screw Conveyer of Sand Fracturing Blender

2013 ◽  
Vol 318 ◽  
pp. 207-211 ◽  
Author(s):  
Hong Yu Jia ◽  
Jian Yi Kong ◽  
Si Zhu Zhou ◽  
Chun Xue Liu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Optimization Design ◽  
Internal Flow ◽  
Field Application ◽  
Field Pattern ◽  
Test Results ◽  
Operation Condition ◽  
Screw Conveyer ◽  
Actual Operation

Screw conveyer is an important component of sand fracturing blender.seamless Link of Pro/e and CFX through ANSYS Workbench. Numerical simulation of water flow over the screw conveyer using Realizable k-ε turbulence model. From the stress nephogram, velocity nephogram, Velocity vector pofile and micro swirl field pattern, it is seems that the test results can work well under the actual operation condition of field application. This paper also focuses on exploring the method of CFX software simulation when it is used to calculate the internal flow field of the screw type sand transporter. Hence, it is an important guiding significance to the structural optimization design of screw conveyer.

Numerical Simulation on Internal Flow Field of Rolling Bearing under Oil-Air Lubrication

2012 ◽  
Vol 271-272 ◽  
pp. 1056-1061 ◽  
Author(s):  
Bao Hong Tong ◽  
Xiao Qian Sun ◽  
Hong Su
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Optimization Design ◽  
Heat Dissipation ◽  
Simulation Analysis ◽  
Roller Bearing ◽  
Internal Flow ◽  
Rolling Bearing ◽  
Flow State ◽  
Air Lubrication

Heat dissipation and working efficiency of transport air in rolling bearing under oil-air lubrication are closely related to the flowing state of oil-air in bearing chamber. For cylindrical roller bearing NF211, numerical simulation model of oil-air flow field in bearing chamber was established combining with the practical structure features of rolling bearing and ignoring the effect caused by roller rotation. Combining with flow field numerical simulation functions of Fluent software, simulation analysis of the flow state in bearing chamber were carried out. Based on k-ε turbulent model, three-dimensional flow field in the bearing chamber and main feature parameters of inner flow were got analyzed carefully considering the effect of twirling. Comparing with the numerical simulation of simplified flow field, it showed that energy dissipation and axial velocity of the air were influenced by the effect of twirling distinctly. Simulation results were expected to give useful references for the optimization design of the oil-air lubrication system in rolling bearing.

Study on Numerical Simulation of Internal Flow Field for the Multi Blade Centrifugal Fan

2014 ◽  
Vol 525 ◽  
pp. 251-255 ◽  
Author(s):  
Sheng Li Zhang ◽  
Hua Xing Li
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Design Theory ◽  
Design Method ◽  
Internal Flow ◽  
Numerical Results ◽  
Centrifugal Fan ◽  
Test Results ◽  
Traditional Design ◽  
Design Program

This paper points out that the traditional design method of multi blade centrifugal fan are great uncertainty in selecting the structure parameters: lead to many design results, do many tests. Internal flow field of multi blade centrifugal fan was simulated with the computational fluid dynamics software Fluent, and the numerical results are analyzed. Comparison of the numerical results with the test results shows that numerical simulation has good accuracy and reliability. The design program and a design example is gived according to the design theory of multi blade centrifugal fan. Method is verified by numerical simulation for the example. Test results show that the design program is reliable.

Application of the Flow Simulation for the Optimization Analysis of SCR DeNOx System of Coal Power Plant

2012 ◽  
Vol 610-613 ◽  
pp. 1533-1539 ◽  
Author(s):  
Xing Lian Ye ◽  
Ding Yang
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Flow Field ◽  
Physical Model ◽  
Model Experiment ◽  
Optimization Design ◽  
Coal Power Plant ◽  
Physical Model Experiment ◽  
Coal Power ◽  
Scr System

Based on the Selective Catalystic Reduction (SCR) DeNOx project for 2×330MW-unit in a coal power plant, the gas flow field in SCR system has been optimized by numerical simulation. The optimized simulation results were compared with the physical model experiment, and the fly ash sedimentation in the duct was also investigated. Correlation analysis of the results shows that, the flow field predicted by numerical simulation matches very well with that of physical model experiment. Numerical simulation can not only predict but also improve the flow field in SCR system. The combination of simulation and physical model experiment provides a reliable basis for flow field optimization design in SCR system.

Numerical simulation of three-dimensional airflow in a novel dual-feed rotor spinning box

2016 ◽  
Vol 88 (3) ◽  
pp. 237-253 ◽  
Author(s):  
Nicholus Tayari Akankwasa ◽  
Huiting Lin ◽  
Yuze Zhang ◽  
Jun Wang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Three Dimensional ◽  
Internal Flow ◽  
Velocity Variation ◽  
Positive Pressure ◽  
Three Dimensional Model ◽  
Air Velocity ◽  
Rotor Spinning ◽  
Pressure Profiles

In order to regulate turbulence strength and determine airflow characteristics in a new dual-feed rotor spinning unit, the internal flow field is investigated. A computational fluid dynamics technique is employed to numerically study the three-dimensional model of the internal airflow in the new design. The effects of air velocity variation on turbulence strength, negative pressure, Re, and wall pressure distribution are investigated based on simulation data and previous studies. The results show that the turbulence strength and Re increased with increase in inlet air velocity. Pressure profiles inside the rotor varied significantly with positive pressure observed at the channel exits. Minimal inlet velocity maintains the flow field in the rotor interior below 100 m/s, which gives the ideal turbulence required to minimize yarn quality deterioration. The dual-feed rotor spinning unit showed more orderly streamline patterns with fewer vortices compared to the conventional one. The numerical simulation can provide insights on airflow studies and some guidelines for future prototyping and experiments to further improve the new design.

Numerical Simulation of Interior Flow Field of Reactor Coolant Pump under Station Blackout Accident

2012 ◽  
Vol 455-456 ◽  
pp. 1002-1008 ◽  
Author(s):  
Yi Ming Xu ◽  
Shi Ming Xu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Internal Flow ◽  
Simulation Method ◽  
Governing Equations ◽  
Coolant Pump ◽  
Reactor Coolant ◽  
Internal Characteristic ◽  
Station Blackout ◽  
Interior Flow

Numerical simulation is used for researching the transient characteristic and internal characteristic of the reactor coolant pump under station blackout accident. The simulation method has been presented by analyzing difference scheme for governing equations. The analytical model of reactor coolant pump flow field has been established by analyzing adequately the influence of varying rotation speed to the pump external characteristic. Finally, the pump internal flow characteristic is exposed.

Numerical simulation of the internal flow field of a new main nozzle in an air-jet loom based on Fluent

2015 ◽  
Vol 85 (15) ◽  
pp. 1590-1601 ◽  
Author(s):  
Liang Chen ◽  
Zhi-hua Feng ◽  
Teng-zhong Dong ◽  
Wei-hua Wang ◽  
Shuai Liu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Internal Flow ◽  
Air Jet ◽  
Air Jet Loom
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