Numerical Simulation of Flow Filed in ESP Outlet with Moving Electrode Type

2012 ◽  
Vol 485 ◽  
pp. 27-30
Author(s):  
Man Yin Hu ◽  
Yu Chao Liang ◽  
Kai Che ◽  
Guang Han ◽  
Xiang Chen
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Flow Velocity ◽  
Geometric Model ◽  
Air Flow ◽  
Flow Distribution ◽  
Simple Algorithm ◽  
Equation Model ◽  
Opening Ratio ◽  
Air Flow Velocity

The numerical simulation of 2-D flow filed in ESP with Moving Electrode Type was carried out, in which a 2-equation model was adopted to simulate the flow field and the computation based on the SIMPLE algorithm and the geometric model was meshed with GAMBIT. The numerical simulation of flow field with FLUENT came to the conclusion that the air flow distribution in the electro static precipitator will change when the opening ratio of the electrodes and the air flow velocity in operation have changed, so the result of numerical simulation was reasonable for the design and operation of the ESP with Moving Electrode Type.

scholarly journals The investigation of the air flow distribution swirling by the rotating suction cylinder

2018 ◽  
pp. 56-60
Author(s):  
A. B. Gol'tsov ◽  
K. I. Logachev ◽  
O. A. Averkova ◽  
V. A. Tkachenko ◽  
I. V. Khodakov
Keyword(s):  
Velocity Distribution ◽  
Flow Velocity ◽  
Air Flow ◽  
Electrical Power ◽  
Flow Distribution ◽  
Rotation Frequency ◽  
Local Exhaust Ventilation ◽  
Exhaust Ventilation ◽  
Aspiration System ◽  
Air Flow Velocity

The improvement of the local exhaust ventilation consists in the emission and pollution agents' concentration at the electrical power minimum expenses. The using of the rotating exhaust cylinder in the aspiration hoods can result in the reduction of both the dust loss into the aspiration system and the dust aerosol transportation costs in the air transfer ducts. We investigated the air flow velocity distribution near the rotating exhaust cylinder depending on the rotation frequency and vented air consumption. The obtained results can be applied when the local closed exhaust hoods designing, that is the designing of the aspiration hoods with the dust-collecting chambers.

Investigation into the effect of the angle of dual slots on an air flow field in melt blowing via numerical simulation

e-Polymers ◽  
2016 ◽  
Vol 16 (4) ◽  
pp. 337-342 ◽  
Author(s):  
Xin Sanfa ◽  
Wang Xinhou
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Boundary Conditions ◽  
Geometric Model ◽  
Air Flow ◽  
Air Velocity ◽  
Melt Blowing ◽  
Temperature Distributions ◽  
Velocity Pressure

AbstractThe effect of the angle of dual slots on an air flow field in melt blowing was researched via numerical simulation. Through establishing the geometric model of air flow field in melt blowing with dual slots, meshing, designating the boundary conditions and their parameters and numerical simulation, the result illustrates the influence of the angle of dual slots on the variations of air velocity, pressure and temperature distributions. Higher peak values of air velocity, pressure and temperature are obtained with larger angles of dual slots near the die, while only a few differences of these parameters are detected away from the die. Our results demonstrate the angle of 70° is the appropriate one that can produce the finest fibers.

Numerical Simulation and Analysis of Velocity Field in Folding-Type Air Filters

2011 ◽  
Vol 374-377 ◽  
pp. 1207-1211
Author(s):  
Yi Ren Wu ◽  
Heng Gen Shen ◽  
Min Fang ◽  
Jin He
Keyword(s):  
Numerical Simulation ◽  
Velocity Field ◽  
Pressure Drop ◽  
Flow Velocity ◽  
Air Flow ◽  
Velocity Fields ◽  
Filter Media ◽  
Air Filters ◽  
The Media ◽  
Air Flow Velocity

In this paper we contrast the velocity fields of uniform and non-uniform porous filter media in folding-type air filters under different porosity conditions by numerical simulation. In addition, the non-uniformity of those velocity fields are measured and calculated. The results show that the non-uniformity of air flow velocity is related to pressure drop, and regarding the media whose porosity is above 95% (Δ＞95%), an effective way to improve the velocity uniformity and reduce the pressure drop is to increase the porosity of filter media and make the media capture particles evenly.

scholarly journals Laptop cooling numerical simulation using Computational Fluid Dynamics

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Syamsuri Syamsuri ◽  
ZA Fairuz ◽  
KDT Alfonsus
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Temperature Distribution ◽  
Flow Velocity ◽  
Air Flow ◽  
Flow Simulation ◽  
Air Flow Rate ◽  
Final Project ◽  
Air Flow Velocity

Laptop’s cooling solution is very important. In some cases, due to poor cooling an over heat on the mother board, main chip, and other components occurs, so that the laptop is quickly broken. Therefore it is necessary to know the temperature distribution so that over heat can be overcome. One of the methods to determine the temperature distribution in this final project is a flow simulation, using CFD (Computational Fluid Dynamics), 3D method with the variation if different air flow velocity, i.e. 5 m/s, 10 m/s, and 15 m/s. The higher the air flow rate, the higher the cooling occurs. From the temperature contours it is shown that the hot temperature is built up on the back of the heat sink. The results of the validation of this study and previous studies obtained an error that occurred was around 4%.Keywords: CFD, variation of air flow velocity, laptop.

scholarly journals The Air Flow Distribution in the Overpressure Sowing Apparatus

2020 ◽  
Vol 14 (1) ◽  
pp. 40-45
Author(s):  
A. Yu. Popov
Keyword(s):  
Flow Velocity ◽  
Flow Rate ◽  
Air Flow ◽  
Flow Distribution ◽  
Volumetric Flow Rate ◽  
Air Velocity ◽  
Air Flow Velocity ◽  
Flow Propagation

To improve the quality of the pneumatic sowing apparatus, it is necessary to study its aerodynamics. (Research purpose) Determination of air flow distribution in the upper part of the seed chamber of the sowing apparatus, taking into account the protrusions of the sowing disk, on which the quality of seeds dosing depends. (Materials and methods) The author chose a sowing apparatus operating at overpressure as an object of research. The author showed that the seed chamber constant sealing in it is provided by the protrusions of the sowing disk, which are made with cut edges on the side of the sowing disk metering element in two planes. The author applied computer simulation of the sowing apparatus. To conduct a numerical experiment, the initial and boundary conditions were determined, and the rotation of the seed disk was taken into account. The calculation of the model was carried out by changing the volumetric air flow in the range of 15-35 liters per second. (Results and discussion) The author constructed isolines of the air velocity distribution at various air flow rates. He determined the values of the air flow in the directions X, Y and Z in the sowing apparatus seed chamber. It was revealed that the largest and the smallest values of this indicator are achieved at 35 and 25 liters per second respectively. It was shown that at an air flow rate in the range of 15-25 liters per second, the distribution of the air flow in the upper part of the seed chamber would be optimal for transporting the seeds with a metering element. The air flow velocity components in Z direction vary in the range from 5.4 to 16.5 meters per second, and in the X and Y directions do not exceed 8 meters per second. (Conclusions) Based on simulation modeling, the author constructed and analyzed graphs of air flow velocity components changes in the three directions of air flow propagation. He determined the nature of the distribution of air flow in the excess seeds discharge area in the design of protrusions with cut corners. He proposed a rational range of air volumetric flow rate of 15-25 liters per second.

EXPERIMENTAL AND ANALYTICAL STUDIES OF VERTICAL AXIS WIND TURBINES

2018 ◽  
pp. 51-58
Author(s):  
B. P. Khozyainov
Keyword(s):  
Wind Turbine ◽  
Flow Velocity ◽  
Wind Power ◽  
Wind Turbines ◽  
Power Efficiency ◽  
Air Flow ◽  
Geometrical Parameters ◽  
Wind Speeds ◽  
Analytical Studies ◽  
Air Flow Velocity

The article carries out the experimental and analytical studies of three-blade wind power installation and gives the technique for measurements of angular rate of wind turbine rotation depending on the wind speeds, the rotating moment and its power. We have made the comparison of the calculation results according to the formulas offered with the indicators of the wind turbine tests executed in natural conditions. The tests were carried out at wind speeds from 0.709 m/s to 6.427 m/s. The wind power efficiency (WPE) for ideal traditional installation is known to be 0.45. According to the analytical calculations, wind power efficiency of the wind turbine with 3-bladed and 6 wind guide screens at wind speedsfrom 0.709 to 6.427 is equal to 0.317, and in the range of speed from 0.709 to 4.5 m/s – 0.351, but the experimental coefficient is much higher. The analysis of WPE variations shows that the work with the wind guide screens at insignificant average air flow velocity during the set period of time appears to be more effective, than the work without them. If the air flow velocity increases, the wind power efficiency gradually decreases. Such a good fit between experimental data and analytical calculations is confirmed by comparison of F-test design criterion with its tabular values. In the design of wind turbines, it allows determining the wind turbine power, setting the geometrical parameters and mass of all details for their efficient performance.

NUMERICAL SIMULATION OF THE AIR FLOW FIELD IN THE MELT BLOWING PROCESS WITH THE USE OF AN AUXILIARY NOZZLE

2013 ◽  
Vol 44 (5) ◽  
pp. 473-482 ◽  
Author(s):  
Yuanling Cheng ◽  
Lili Wu ◽  
Ting Chen
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Air Flow ◽  
Melt Blowing

Experimental investigation of the air flow in a simplified underhood environment

2021 ◽  
pp. 095440702110597
Author(s):  
Randi Franzke ◽  
Simone Sebben ◽  
Emil Willeson
Keyword(s):  
Flow Field ◽  
Laser Doppler Anemometry ◽  
Fluid Dynamic ◽  
Air Flow ◽  
Measurement Data ◽  
Quality Measurement ◽  
Flow Distribution ◽  
Lateral Position ◽  
Reference Case ◽  
Lateral Direction

In this paper, a simplified underhood environment is proposed to investigate the air flow distribution in a vehicle-like set-up and provide high quality measurement data that can be used for the validation of Computational Fluid Dynamic methods. The rig can be equipped with two types of front openings representative for electrified vehicles. Furthermore, it is possible to install differently shaped blockages downstream of the fan to imitate large underhood components. The distance between the blockages and the fan can be varied in longitudinal and lateral direction. The measurements are performed with Laser Doppler Anemometry at a fixed distance downstream of the fan. The results show that the lack of an upper grille opening in the configuration for a battery electric vehicle has a notable impact on the flow field in the reference case without any downstream blockage. However, the differences in the flow field between the two front designs become less when a downstream obstruction is present. The longitudinal and lateral position of the blockages have a minor impact on the flow field compared to the shape of the obstacle itself.

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