Optimum Design on the Meridional Shape of a Multistage Centrifugal Pump Impeller for Performance Improvement

2019 ◽  
Vol 22 (3) ◽  
pp. 41-48
Author(s):  
Ming Guo ◽  
Young-Do Choi
Keyword(s):  
Centrifugal Pump ◽  
Performance Improvement ◽  
Optimum Design ◽  
Pump Impeller ◽  
Multistage Centrifugal Pump ◽  
Meridional Shape ◽  
Centrifugal Pump Impeller

Analysis on the Corrosion Failure of MDS Mine Multistage Centrifugal Pump Impeller

2013 ◽  
Vol 650 ◽  
pp. 344-349 ◽  
Author(s):  
Xiang Zhang ◽  
Wen Ming You ◽  
Yi Jun Zhou ◽  
Yong Sheng Li ◽  
Sheng Jie Qiu
Keyword(s):  
Centrifugal Pump ◽  
Fracture Morphology ◽  
Prevention Measures ◽  
Spectroscopy Analysis ◽  
Pump Impeller ◽  
Corrosion Failure ◽  
Multistage Centrifugal Pump ◽  
Metallurgical Analysis ◽  
Solid Liquid ◽  
Centrifugal Pump Impeller

This paper carried out composition test, metallurgical analysis and water samples test of work environment for the centrifugal pump impeller material which experiences corrosion failure. Then combined with the scanning electron microscope and spectroscopy analysis of the fracture morphology, it conducted XRF analysis for the corrosion material to study the unsuccessful corrosion of MDS multistage centrifugal pump impeller in coal mine well water with alkalescence. The researches show that washout of solid - liquid composite phase leads to the serious erosion of pump impeller. The turbulence corrosion and cavitation are the main reasons which cause unsuccessful corrosion of this pump, while the organization defections such as dendritic graphite and binary phosphorus eutectic are important factors that lead to the severe local corrosion of impeller. Moreover, the corresponding prevention measures are proposed.

scholarly journals Numerical identification of blade exit angle effect on the performance for a multistage centrifugal pump impeller

2015 ◽  
Vol 92 ◽  
pp. 02003 ◽  
Author(s):  
Osman Babayigit ◽  
Osman Kocaaslan ◽  
Muharrem Hilmi Aksoy ◽  
Kursad Melih Guleren ◽  
Muammer Ozgoren
Keyword(s):  
Centrifugal Pump ◽  
Exit Angle ◽  
Pump Impeller ◽  
Multistage Centrifugal Pump ◽  
Angle Effect ◽  
Centrifugal Pump Impeller

Numerical Optimization of a Centrifugal Pump Impeller with Splitter Blades Running in Reverse Mode

2016 ◽  
Vol 10 (4) ◽  
pp. 215 ◽  
Author(s):  
Ioannis Kassanos ◽  
Marios Chrysovergis ◽  
John Anagnostopoulos ◽  
George Charalampopoulos ◽  
Stamelos Rokas ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Numerical Optimization ◽  
Pump Impeller ◽  
Reverse Mode ◽  
Centrifugal Pump Impeller

scholarly journals Large Eddy Simulation of Periodic Transient Pressure Fluctuation in a Centrifugal Pump Impeller at Low Flow Rate

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 311
Author(s):  
Renfei Kuang ◽  
Xiaoping Chen ◽  
Zhiming Zhang ◽  
Zuchao Zhu ◽  
Yu Li
Keyword(s):  
Large Eddy Simulation ◽  
Centrifugal Pump ◽  
Flow Rate ◽  
Pressure Fluctuation ◽  
Low Frequency ◽  
Pump Impeller ◽  
Eddy Simulation ◽  
Inlet Flow Rate ◽  
Large Eddy ◽  
Centrifugal Pump Impeller

This paper presents a large eddy simulation of a centrifugal pump impeller during a transient condition. The flow rate is sinusoidal and oscillates between 0.25Qd (Qd indicates design load) and 0.75Qd when the rotating speed is maintained. Research shows that in one period, the inlet flow rate will twice reach 0.5Qd, and among the impeller of one moment is a stall state, but the other is a non-stall state. In the process of flow development, the evolution of low-frequency pressure fluctuation shows an obviously sinusoidal form, whose frequency is insensitive to the monitoring position and equals to that of the flow rate. However, inside the impeller, the phase and amplitude in the stall passages lag behind more and are stronger than that in the non-stall passages. Meanwhile, the strongest region of the high-frequency pressure fluctuation appears in the stall passages at the transient rising stage. The second dominant frequency in stall passages is 2.5 times to that in non-stall passages. In addition, similar to the pressure fluctuation, the evolution of the low-frequency head shows a sinusoidal form, whose phase is lagging behind that by one-third of a period in the inlet flow rate.

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