Reaction-Crystallization of Struvite in a Continuous Liquid Jet-Pump DTM MSMPR Crystallizer with Upward Circulation of Suspension in a Mixing Chamber – an SDG Kinetic Approach

2007 ◽  
Vol 30 (11) ◽  
pp. 1576-1583 ◽  
Author(s):  
J. Koralewska ◽  
K. Piotrowski ◽  
B. Wierzbowska ◽  
A. Matynia
Keyword(s):  
Kinetic Approach ◽  
Liquid Jet ◽  
Jet Pump ◽  
Mixing Chamber

Numerical Simulation on Flow Structure of a Steam-Jet Pump Influenced by Primary Nozzle Geometries

2011 ◽  
Vol 130-134 ◽  
pp. 1703-1707 ◽  
Author(s):  
Xiao Chun Dai ◽  
Jian Huo
Keyword(s):  
Fluid Dynamics ◽  
Flow Structure ◽  
Mixing Process ◽  
Nozzle Outlet ◽  
Jet Pump ◽  
Entrainment Ratio ◽  
Great Loss ◽  
Mixing Chamber ◽  
Throat Diameter ◽  
Nozzle Geometries

The aim of the paper is to reveal the flow structure and the mixing process of a steam-jet pump by using a computational fluid dynamics code FLUENT. Discusses the effect on a steam-jet pump’s entrainment ratio when the throat diameter of the primary nozzle as well as the outlet diameter of the primary nozzle is varied. Analyzes the position of shock wave which will bring the steam-jet pump’s performance a great loss. The performances of a steam-jet pump are studied by changing back pressures while the distance between primary nozzle outlet and mixing chamber inlet (DPM) is varied. The entrainment ratios of a steam-jet pump with different values of DPM and different back pressures are calculated.

Experimental and numerical studies of the effect of area ratio and driving pressure on the performance of water and slurry jet pumps

2011 ◽  
Vol 226 (9) ◽  
pp. 2250-2266 ◽  
Author(s):  
Tarek Meakhail ◽  
Ibrahim Teaima
Keyword(s):  
Area Ratio ◽  
Driving Pressure ◽  
Operating Conditions ◽  
Jet Pump ◽  
Numerical Studies ◽  
Pumping Stations ◽  
Mixing Chamber ◽  
Jet Pumps ◽  
Different Diameters ◽  
Experimental Rig

The slurry jet pump with scouring nozzle system can be used in dredging of sites, which are difficult to access or need handling of equipments that are used for the intake of pumping stations under bridges and concrete water channels. This system is suitable for sand, silt, sludge, mud, and other organic materials. The aim of this study is to investigate the performance of water and slurry jet pumps. The effects of the pump-operating conditions and geometries on its performance were investigated. The experimental rig was constructed in such a way that the driving nozzle diameter can be changed. In this study, three different diameters of driving nozzles, 10, 12.7, and 16 mm, have been used with one mixing chamber of 25.4 mm diameter (i.e. three different area ratios of R = 0.155, 0.25, and 0.4). Also, the effect of driving pressure has been investigated. The results show that increasing the area ratio decreases the maximum mass flow ratio. The results of computational fluid dynamics were found to agree well with actual values obtained from the experimental water and slurry jet pump.

Kinney liquid jet pump

Vacuum ◽  
1964 ◽  
Vol 14 (12) ◽  
pp. 485
Keyword(s):  
Liquid Jet ◽  
Jet Pump

Simulation of a downhole jet-vortex pump’s working process

Nafta-Gaz ◽  
2021 ◽  
Vol 77 (9) ◽  
pp. 579-586
Author(s):  
Denis Panevnyk ◽  
Keyword(s):  
Dynamic Pressure ◽  
Relative Displacement ◽  
Average Error ◽  
Oil Well ◽  
Jet Pump ◽  
Cross Sectional ◽  
Pressure Characteristic ◽  
System Pressure ◽  
Dynamic Head ◽  
Mixing Chamber

The article is devoted to the theoretical study of the operation process of the borehole ejection system as part of the tubing string, jet pump and packer installed below; the system implements the hydrojet method of oil well operation. The improved design of the jet pump contains inclined guiding elements placed in its receiving chamber for swirling the injected flow, which results in an increase in the efficiency of the borehole ejection system. Based on the law of conservation of liquid momentum in the mixing chamber of the jet pump and taking into account the inertial pressure component caused by the swirling of the injected flow, there is obtained the relative form of the equation of the ejection system pressure characteristic, the structure of which contains a component that determines the value of the additional dynamic head. According to the results obtained, the additional dynamic head caused by swirling of the injected flow is determined by the ratio of the geometric dimensions of the flow path of the jet pump, the angle of inclination of the elements for creating vortex flows, and the ratio of the power and reservoir fluids. In the case of asymmetric swirling of the injected flow, an increase in the value of the relative displacement of the jet pump decreases the value of the additional dynamic pressure. In order to study the effect of flow swirling on the energy characteristic of the ejection system, the pressure characteristic of the jet pump was transformed into the dependence of its efficiency on the injection coefficient. Jet pump models with the ratio of the cross-sectional areas of the mixing chamber and the nozzle of 5.012 and 6.464, respectively, were used to check the adequacy of the theoretical pressure and energy characteristics obtained during the simulation of the performance process of the concentric ejection system. The average error in the theoretical determination of the pressure and efficiency of the vortex jet does not exceed 8.65% and 6.48%, respectively.

Numerical Study on Performance Parameter of Pulsed Liquid Jet Pump

2011 ◽  
Vol 346 ◽  
pp. 793-796
Author(s):  
Ling Hua Wang ◽  
Ying Wu ◽  
Pan Hua Ning ◽  
Chao Gan
Keyword(s):  
Numerical Study ◽  
Liquid Jet ◽  
Entrainment Rate ◽  
Performance Parameters ◽  
Jet Pump ◽  
Improve Performance ◽  
Basic Performance ◽  
Working Parameters ◽  
Performance Equation ◽  
Pulse Jet

The performance parameters of time-average basic performance equation of pulsed liquid jet pump are studied innumerical methods. Optimal working parameters, change law and influence on performance of momentum correction factor, throat tube inlet function are quantitatively analyzed. The conclusion is obtained that pulse jet could mainly make fluid of throat tube outlet more fully mix and optimal working parameters of liquid jet pump better improve. Also, change law of throat tube inlet function shows the reason why pulse liquid jet pump could improve performance, mainly to increase the entrainment rate.

scholarly journals Numerical Investigation of the Flow Field and Mass Transfer Characteristics in a Jet Slurry Pump

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 2053
Author(s):  
Yi’nan Qian ◽  
Yuanshun Wang ◽  
Zhenlong Fang ◽  
Xiuhan Chen ◽  
Sape A. Miedema
Keyword(s):  
Flow Field ◽  
Numerical Study ◽  
Pressure Ratio ◽  
Three Dimensional ◽  
Internal Flow ◽  
Axial Line ◽  
Suction Pressure ◽  
Flow Ratio ◽  
Jet Pump ◽  
Mixing Chamber

A jet pump is used to transport a variety of working media and is especially suitable for dredged soil transporting. In this study, a three-dimensional numerical study of a jet pump that is used for slurry delivery was carried out. The characteristics of the internal flow field of the mixing chamber with different working parameters were comprehensively analyzed. The results indicate that the pressure of the axial line decreases with increasing flow ratio (ratio of suction flux and inlet flux) while the pressure of the injected slurry shows a downward trend. With the increase in the flow ratio, the pressure ratio (difference between inlet pressure and suction pressure divided by the difference between exit pressure and suction pressure) falls off while the efficiency presents a parabolic distribution. The pressure ratio can be promoted by properly increasing the length of the mixing chamber so that the available efficiency is broadened. When the mixing chamber length is L = 2.5Dn~4.0Dn (Dn is nozzle outlet diameter), the highly efficient area is wide; in particular, when L = 3.5Dn, the jet slurry pump with the highest efficiency of 27.6% has the best performance.

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