Simulation of the Gas-Liquid-Solid Three-Phase Flow Velocity Field Outside the Abrasive Water Jet(AWJ) Rectangle Nozzle and Ellipse Nozzle

2007 ◽  
pp. 470-473
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Li Li ◽  
Zong Wei Niu ◽  
Zhi Yong Li
Keyword(s):  
Velocity Field ◽  
Flow Velocity ◽  
Water Jet ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Flow Velocity Field ◽  
Three Phase ◽  
Three Phase Flow

Simulation of the Gas-Liquid-Solid Three-Phase Flow Velocity Field Outside the Abrasive Water Jet(AWJ) Rectangle Nozzle and Ellipse Nozzle

2007 ◽  
Vol 359-360 ◽  
pp. 470-473
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Li Li ◽  
Zong Wei Niu ◽  
Zhi Yong Li
Keyword(s):  
Velocity Field ◽  
Flow Field ◽  
Fluid Dynamic ◽  
Water Jet ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Flow Velocity Field ◽  
Three Phase ◽  
Three Phase Flow ◽  
Dynamic Software

Simulation of the flow field of the gas-liquid-solid three-phase flow outside the abrasive water jet rectangle nozzle and ellipse nozzle is studied by the computed fluid dynamic software-fluent, and the velocity field of the three-phase flow is obtained. The simulation result expresses that the flow is expanded when it is out of the nozzle; the velocity of the flow is the highest at the axis, which comes down by its side, the velocity of the flow is high at the beginning then it is decreased because the flow is resisted by the air; the shape of the jet at the start is closed to the geometry of the nozzle, then it is rounded in the external area; the velocity field outside the ellipse nozzle is distributed evenly around the center. By plotting the velocity field of the rectangle nozzle and the ellipse nozzle in the Y-Z section, it is expressed that the changing range of velocity is enlarged with the increasing of distance offset the nozzle.

Numerical Simulation and Experimental Investigation of the Gas-Liquid-Solid Three-Phase Flow Outside of the Abrasive Water Jet Nozzle

2010 ◽  
Vol 431-432 ◽  
pp. 90-93 ◽  
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Hong Tao Zhu ◽  
Qing Zhi Zhao
Keyword(s):  
Fluid Dynamic ◽  
Vibration Signal ◽  
Simulation Method ◽  
Water Jet ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Three Phase ◽  
Three Phase Flow ◽  
Force Signal ◽  
The Impact

Simulation of the gas-liquid-solid three-phase flow field of outside the abrasive water jet(AWJ) nozzle is studied by the computed fluid dynamic software- FLUENT, and the velocity field of the three-phase flow is obtained, the velocity value of the flow between the nozzle and work-pieces is also obtained. Serial experiments have been done to verify the simulation method. In the experiments, the impact force signal of the AWJ outside the nozzle is collected by the piezoelectricity ergometer, then it is filtered by the vibration signal and dynamic signal software. The testing values are transformed to the velocity values, which will be compared with the simulation values. The comparison result indicates that the value of the simulation is changing similarly with the experiment value, and both value is almost the same, which proves that the simulation method is successful, the simulation model and the boundary conditions are right.

Simulation of Gas-Solid-Liquid Three-Phase Flow Inside and Outside the Abrasive Water Jet Nozzle

2006 ◽  
Vol 532-533 ◽  
pp. 833-836 ◽  
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Hong Tao Zhu ◽  
Yan Xia Feng
Keyword(s):  
Water Jet ◽  
Border Zone ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Three Phase ◽  
Three Phase Flow ◽  
Jet Nozzle ◽  
Velocity Changes ◽  
Solid Liquid ◽  
Model Water

Simulation of the velocity field of gas-solid-liquid three-phase flow inside and outside the abrasive water jet nozzle was studied by the computational fluid dynamics software (CFD). The complicated velocity field of the flow in the abrasive water jet (AWJ) nozzle and the abrasive track in the nozzle were obtained. In the course of the simulation, the inter-phase drag exchange coefficient model uses Gidaspow model (gas-solid), Wen-yu model (water-solid), Schiller-Naumann model (water-gas) respectively. The simulation results indicate that the swirl is produced in the nozzle and the abrasives are accelerated and moved around the swirl, and they are all distributed along the inner surface of the nozzle, the gas is mostly distributed in the center of swirl. The dispersion of the flow happens when it flows out of the nozzle, it can be divided into three zones, that is core zone, middle zone and border zone. At the core zone the velocity changes little while the velocity changes greatly at the middle zone, the velocity fluctuates greatly at the border zone.

Simulation of Velocity Field of Two-Phase Flow for Gas and Liquid in the Abrasive Water Jet Nozzle

2006 ◽  
Vol 315-316 ◽  
pp. 150-153 ◽  
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Yan Xia Feng ◽  
Hong Tao Zhu
Keyword(s):  
Velocity Field ◽  
Cone Angle ◽  
Water Jet ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Complex Velocity ◽  
Two Phase ◽  
Jet Nozzle ◽  
Cone Surface ◽  
Gas Liquid Flow

Simulation on velocity field of gas-liquid flow in the abrasive water jet nozzle was studied by the computed fluid dynamics (CFD) software, The complex velocity field of the flow in the abrasive water jet nozzle can be obtained by means of simulation. The study on the effect of the nozzle inner cone angle on the velocity field shows that the cone angle affects the whirlpool’s intension and position of the whirlpool in the nozzle of abrasive water jet (AWJ), and it also affects velocity ‘s magnitude and distribution of the velocity on the cone surface.

Measuring Flow Velocity and Flow Pattern of a Suspension-Gas Mixture Inside a Twin-Fluid Atomizer

2006 ◽  
Author(s):  
Florian Schmidt ◽  
Dieter Mewes ◽  
Marc Lo¨rcher
Keyword(s):  
Flow Velocity ◽  
Flow Pattern ◽  
Cross Section ◽  
Flow Rate ◽  
Particle Concentration ◽  
Volume Flow ◽  
Phase Flow ◽  
Three Phase ◽  
Three Phase Flow ◽  
Gas Volume

Twin-fluid atomizers are widely used for spray-drying application. The suspension to be dried can be atomized very efficiently if the atomizer is operated at critical conditions. The three-phase flow containing solids, gas and liquid is accelerated inside the atomizer due to a pressure gradient. If the upstream pressure is sufficiently high, a maximum possible mass flow rate is achieved. This operating condition is called “critical”. The velocity of the three-phase flow and the flow pattern in the exit cross section has a major impact on the jet break-up and thus on the spray characteristics. In this experimental work the flow velocity and flow pattern inside the nozzle of the atomizer is measured. A laser-sensor is used to determine the flow velocity via cross-correlation at different operating conditions and positions inside the nozzle. The same sensor is used to measure the flow pattern by analyzing the time dependent laser light absorption of of the flow. The influence of various compositions of the suspension concerning gas volume flow rate and particle concentration on the measured velocities and flow patterns are derived. Higher gas volume flow rates increase the velocities and higher particle concentration have a decreasing influence. For a pure gas-liquid flow the obtained results are in good agreement with a theoretical model. In the exit cross-section plug flow and annular flow is observed depending on the gas volume flow fraction. The particles in the suspension have no significant influence on the flow pattern.

scholarly journals Energy Demodulation Algorithm for Flow Velocity Measurement of Oil-Gas-Water Three-Phase Flow

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Yingwei Li ◽  
Jing Gao ◽  
Xingbin Liu ◽  
Ronghua Xie
Keyword(s):  
Liquid Phase ◽  
Phase Velocity ◽  
Flow Velocity ◽  
Gas Phase ◽  
Velocity Measurement ◽  
Phase Flow ◽  
Three Phase ◽  
Flow Velocity Measurement ◽  
Three Phase Flow ◽  
Oil Gas

Flow velocity measurement was an important research of oil-gas-water three-phase flow parameter measurements. In order to satisfy the increasing demands for flow detection technology, the paper presented a gas-liquid phase flow velocity measurement method which was based on energy demodulation algorithm combing with time delay estimation technology. First, a gas-liquid phase separation method of oil-gas-water three-phase flow based on energy demodulation algorithm and blind signal separation technology was proposed. The separation of oil-gas-water three-phase signals which were sampled by conductance sensor performed well, so the gas-phase signal and the liquid-phase signal were obtained. Second, we used the time delay estimation technology to get the delay time of gas-phase signals and liquid-phase signals, respectively, and the gas-phase velocity and the liquid-phase velocity were derived. At last, the experiment was performed at oil-gas-water three-phase flow loop, and the results indicated that the measurement errors met the need of velocity measurement. So it provided a feasible method for gas-liquid phase velocity measurement of the oil-gas-water three-phase flow.

Simulation of Solid-Liquid Two-Phase Flow Inside and Outside the Abrasive Water Jet Nozzle

2007 ◽  
Vol 339 ◽  
pp. 453-457 ◽  
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
X.Y. Lu ◽  
Yan Xia Feng
Keyword(s):  
Velocity Field ◽  
Two Phase Flow ◽  
Cone Angle ◽  
Water Jet ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Two Phase ◽  
Inner Surface ◽  
Jet Nozzle ◽  
Solid Liquid

Simulation of the velocity field of solid-liquid flow inside and outside the abrasive water jet nozzle was studied by the computational fluid dynamics software(CFD). The velocity field of the flow in the abrasive water jet (AWJ) nozzle was obtained. The results indicate that the swirl is produced in the nozzle and the abrasives are all distributed along the inner surface of the nozzle. The velocity at the center of the outlet face is the highest, while it is smallest at the both edge. The dispersion of the flow is happened when it flows out of the nozzle, but the flow velocity away from the outlet at a distance of about 4 times of the outlet diameter changes little. The fillet diameter, the inner cone angle, the length of mixing tube of the nozzle greatly affect the field of two-phase flow. The velocity of outlet increases with an increase in the fillet diameter, the flow becomes ease when the cone angle decreases, the mixing tube hampers the two-phase flowing.

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