Three-Dimensional Simulation of Liquid-Solid Two-Phase Flow Inside the Abrasive Water Jet Nozzle

2007 ◽  
Vol 329 ◽  
pp. 329-334
Author(s):  
Chuan Zhen Huang ◽  
Rong Guo Hou ◽  
Jun Wang ◽  
X.Y. Lu ◽  
Hong Tao Zhu
Keyword(s):  
Velocity Field ◽  
Cross Section ◽  
Three Dimensional ◽  
Flow Speed ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Two Phase ◽  
Mixing Chamber ◽  
Jet Nozzle ◽  
Dimensional Simulation

Three dimensional simulation of the velocity field of solid-liquid two-phase flow inside the abrasive water jet nozzle was studied by the computational fluid dynamics software (CFD). The complicated velocity field and vectorgraph of the flow in the abrasive water jet nozzle was obtained. In the course of the simulation, the Syamlal-O’Brien model was used to decide the inter-phase drag exchange coefficient. The velocity vectorgraph simulation results indicate that the highest flow speed is occurred at the inlet of the mixing chamber and the flow speed is gradually decreased along the direction of the nozzle axis and got to the lowest speed at the outlet of the nozzle. And also the flow speed in the cross section of the mixing chamber is gradually reduced along the radial direction of the cross section and got to the lowest speed in the verge of the chamber. The comparison of simulation result for the velocity field of water and abrasive exhibits that the velocity of water in the mixing chamber is three or four times higher than that of abrasive.

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.

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.

Effects of Mixing Chamber Shape on Cutting Performance in Abrasive Water Jet

2013 ◽  
Vol 652-654 ◽  
pp. 2134-2139
Author(s):  
Hyo Ryeol Lee ◽  
Yong Sik Cho ◽  
Hwa Young Kim ◽  
Jung Hwan Ahn
Keyword(s):  
Surface Roughness ◽  
Cutting Speed ◽  
Water Jet ◽  
Orifice Diameter ◽  
Abrasive Water Jet ◽  
Processing Technologies ◽  
Mixing Chamber ◽  
Energy Processing ◽  
And Performance ◽  
Pump Pressure

It is well known that abrasive water jet(AWJ) was developed as a kind of high-density energy processing technologies. AWJ is used to obtain cutting quality of various materials such as metal, ceramics, glass and composite materials within a short manufacturing time because of the characteristics of heatless and noncontact processing. However, surface roughness and dimension error like round, burr, taper depend on the cutting conditions such as pump pressure, cutting speed, orifice diameter, stand off distance, abrasive flow rate and workpiece. In this paper, the effect of the shape of mixing chamber on surface quality is studied. Parabolic mixing chamber is proposed and performance is compared to that of cylindrical mixing chamber by experiment. The surface roughness was improve 0.15㎛ to 2.29㎛ and the taper angle was improve 0.0716° to 0.143° by parabolic mixing chamber.

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