Analysis of Solid-Liquid Two-Phase Flow in Axial Flow Pump

2012 ◽  
Vol 229-231 ◽  
pp. 559-564
Author(s):  
Hong Hua ◽  
Xiao Lin Wang ◽  
Hui Yan Wang ◽  
Xiao Bing Liu
Keyword(s):  
Axial Flow ◽  
Sediment Concentration ◽  
Secondary Development ◽  
Turbulent Model ◽  
Two Phase ◽  
Simplec Algorithm ◽  
Axial Flow Pump ◽  
Pump Inlet ◽  
Solid Liquid ◽  
Flow Pump

The liquid-solid two-phase turbulent flow in an axial flow pump was numerically simulated by using the SIMPLEC algorithm based Navier-Stoker and RNG k-ε turbulent model and after the secondary development of the software Fluent. The distributions of solid concentration, velocity and pressure on the impellers of the axial flow pump were analyzed at different volume concentrations at the pump inlet. The numerical results show that the head and the efficiency of the pump will reduce with the increasing of the sediment concentration in sandy rivers. This research shows that the numerical simulation results are consistent with the actual situations.

Numerical Simulation of 3D Solid-Liquid Two-Phase Turbulence Flow in Axial-Flow Pump Impeller

2012 ◽  
Vol 212-213 ◽  
pp. 1237-1243
Author(s):  
Hong Hua ◽  
Xiao Bing Liu ◽  
Shun Bing Ou ◽  
Yong Zhong Zeng
Keyword(s):  
Numerical Simulation ◽  
Single Phase ◽  
Axial Flow ◽  
Secondary Development ◽  
Phase Flow ◽  
Two Phase ◽  
Pump Impeller ◽  
Axial Flow Pump ◽  
3D Solid ◽  
Solid Liquid

With the use of the RNG k-ε turbulence model and the SIMPLEC algorithm, as well as after the secondary development of the software Fluent, the velocity field and pressure field of a axial flow impeller were numerically simulated in the single-phase (clear water) and the solid-liquid two-phase conditions. The distributions of pressure, velocity and solid concentration in the impeller under the single-phase flow and the solid-liquid two-phase flow conditions were compared. This study has shown that the numerical simulation results are the same as the actual situation.

Numerical Simulation of Solid Particles Movement in the Axial Flow Impeller and Wear Experiment

2012 ◽  
Vol 152-154 ◽  
pp. 1572-1577
Author(s):  
De Sheng Zhang ◽  
Wei Dong Shi ◽  
Yan Xu ◽  
Fei Long
Keyword(s):  
Numerical Simulation ◽  
Axial Flow ◽  
Solid Particles ◽  
Pressure Side ◽  
Two Phase ◽  
Performance Curves ◽  
Wear And Tear ◽  
Simplec Algorithm ◽  
Axial Flow Pump ◽  
Solid Liquid

The performance curves of a submersible axial flow pump were predicted based on mixture multiphase flow model, RNG k-ε turbulence model and SIMPLEC algorithm, and the solid-liquid two-phase flow in the impeller was simulated. The numerical results show that the performance prediction of the head and efficiency curves show good agreement with the experimental data in the whole flow rate range, and the solid particles in the impeller are mainly distributed on pressure side of blades, while less on the suction side.The solid particles are mainly concentrated in the blade inlet and region near the hub of the pressure side. The experimental results also show that the blade pressure sides have serious erosion, particularly near the hub, but less wear and tear on the suction side.The accuracy of the numerical simulation results are verified by the experiments.

scholarly journals Solid-Liquid Flow of Axial Flow Pump in Loop Reactor and Operating Control with Single Invert

2019 ◽  
Vol 18 (3) ◽  
pp. 464-475
Author(s):  
H. Yan ◽  
Y. R. Wang ◽  
H. X. Shi ◽  
Q. Li ◽  
Y. S. Zeng ◽  
...  
Keyword(s):  
Liquid Flow ◽  
Axial Flow ◽  
Loop Reactor ◽  
Axial Flow Pump ◽  
Solid Liquid ◽  
Flow Pump

On Utilization of Contra-Rotating Axial Flow Pump in Air/Water Two-phase flow

2004 ◽  
Vol 2004.57 (0) ◽  
pp. 249-250
Author(s):  
Toru SHIGEMITSU ◽  
Akinori FURUKAWA ◽  
Satoshi WATANABE ◽  
Kusuo OKUMA
Keyword(s):  
Two Phase Flow ◽  
Axial Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Axial Flow Pump ◽  
Flow Pump

Air/Water Two-Phase Flow Performance of Contra-Rotating Axial Flow Pump and Rotational Speed Control of Rear Rotor

2005 ◽  
Author(s):  
Toru Shigemitsu ◽  
Akinori Furukawa ◽  
Satoshi Watanabe ◽  
Kusuo Okuma
Keyword(s):  
Flow Rate ◽  
Rotational Speed ◽  
Two Phase Flow ◽  
Axial Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Rate Range ◽  
Flow Rate Range ◽  
Axial Flow Pump ◽  
Flow Pump

An application of contra-rotating rotors, consisting of front and rear rotors rotating in the opposite direction from each other, has been proposed against a demand for developing a higher specific speed axial flow pump with a more compact structure, higher efficiency and higher cavitation performance. As axial flow pumps are used for standby operations of air-lock and air/water mixing discharge to prevent floods, air/water two-phase flow performance of the contra-rotating pump has to be also investigated. In the present paper, therefore, experimental results on air/water two-phase flow performance of a test pump with contra-rotating rotors are shown and compared with those of a conventional axial flow pump, consisting of a front rotor and a rear stator. Even under two-phase flow conditions head characteristic curve of the contra-rotating type has a more strongly negative slope than that of the conventional type. The contra-rotating type maintains higher head and higher efficiency even in the low flow rate range and vice versa in the high flow rate range. This result will be discussed by considering the change of outlet flow from front rotor due to two-phase flow with the help of observed air behavior in the rotors. Then effects of changes of rear rotor rotational speed different from front rotor speed, which is an advantage of the contra-rotating axial flow pump, on two-phase flow performance are examined. Under the condition of constant ratio of air to water flow rates, the head rise of the rear rotor linearly increases with rear rotor rotational speed. Air/water two-phase flow performance of the contra-rotating axial flow pump can be improved by this control procedure for the rear rotor rotational speed.

scholarly journals CFD numerical simulation of sand-contained cavitation characteristics of axial-flow pump

2021 ◽  
Vol 13 (7) ◽  
pp. 168781402110327
Author(s):  
Peng Lin ◽  
Dong Hu ◽  
Jing-Man Lu ◽  
Shu Wang
Keyword(s):  
Particle Size ◽  
Flow Pattern ◽  
Great Influence ◽  
Axial Flow ◽  
Internal Flow ◽  
Sediment Concentration ◽  
Clean Water ◽  
Cavitation Performance ◽  
Axial Flow Pump ◽  
Flow Pump

To study the effect of sediment on the cavitation in the axial-flow pump, the method of CFD is employed to experiment on the internal flow field of the pump in the case of cavitation in clean water and sandy water separately. The calculation is done with different particle sizes and sediment concentrations. The results show that as the sediment concentration increases, the vortex range and cavitation area of the blade will further increase, and the flow pattern in the impeller becomes more disordered. The mechanism of action of particle size on cavitation is similar to that of sediment concentration. However, cavitation in clean water is quite different from that in sandy water in that the cavitation value and range in sandy water are significantly larger than that in clean water. By contrast, the particle size has little effect on the cavitation value and range. It proves that particle size does not have a great influence on cavitation distribution, but sediment concentration is the main factor affecting the cavitation performance of the pump. Moreover, sediment will disrupt the internal flow pattern of the pump, promote the development of cavitation and further reduce the cavitation performance of the pump.

scholarly journals The mechanism of joint effects of axial-flow pump cavitation and sediment wear

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402092306
Author(s):  
Peng Lin ◽  
Dong Hu ◽  
Zi-jun Lin ◽  
Mei-qing Liu ◽  
Chuan-lin Tang ◽  
...  
Keyword(s):  
Particle Size ◽  
Wear Rate ◽  
Volume Fraction ◽  
Axial Flow ◽  
Sediment Concentration ◽  
Sediment Distribution ◽  
Joint Effects ◽  
Multiple Variables ◽  
Axial Flow Pump ◽  
Flow Pump

This article studies the flow trajectories and the wear law of sediment particles in a pump considering multiple variables, such as sediment concentration, particle size, and cavitation stage. In addition, the mechanism of joint effects of cavitation and sediment wear of the axial-flow pump is explored. In this work, the characteristics of cavitation and sediment wear in an axial-flow pump are investigated by the numerical simulation using shear stress transport k–ω turbulence model with experimental validation. The external characteristics of experimental results and numerical simulations are in agreement. The results show that the sediment concentration exerts a profound influence on the vacuole distribution in the pump, while the particle size has little effect on it. Cavitation can increase the volume fraction of the solid, accelerate the wear on the components, and affect the sediment distribution in the impeller. Cavitation and sediment wear are mutually worsening, and their joint effects will form a vicious circle. With the decrease in inlet pressure and the increase in sediment concentration and particle size, the maximum wear rate will gradually increase, which proves that cavitation, sediment concentration, and particle size are the main factors that influence the maximum wear rate.

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