Numerical Analysis of Cavitation Flow in Low Specific Speed Condensate Pump Impeller

2019 ◽  
Author(s):  
Chang-Shen Lu ◽  
Zheng-Gui Li ◽  
Xin-rui Li ◽  
Xin Chai ◽  
Xiao-bing Liu ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Cavitation Flow ◽  
Pump Impeller ◽  
Condensate Pump ◽  
Low Specific Speed ◽  
Specific Speed

Development and numerical analysis of low specific speed mixed-flow pump

2012 ◽  
Vol 15 (3) ◽  
pp. 032017 ◽  
Author(s):  
H F Li ◽  
Y W Huo ◽  
Z B Pan ◽  
W C Zhou ◽  
M H He
Keyword(s):  
Numerical Analysis ◽  
Mixed Flow ◽  
Low Specific Speed ◽  
Specific Speed ◽  
Flow Pump

Applied Micro Genetic Algorithm to Optimize Design Low Specific Speed Pump Impeller

2013 ◽  
Vol 816-817 ◽  
pp. 1010-1014
Author(s):  
Deng Song Li ◽  
Wen Wu Song ◽  
Fu Jie ◽  
Tian Long Wu
Keyword(s):  
Genetic Algorithm ◽  
Optimization Design ◽  
High Efficiency ◽  
Design Method ◽  
Pump Impeller ◽  
Shaft Power ◽  
Low Specific Speed ◽  
Micro Genetic Algorithm ◽  
Specific Speed ◽  
Design Deficiencies

The combination of enlarged flow design and micro-genetic algorithm constitute a new optimization design method, which be applied to optimization design of low specific speed pump impeller. It improves enlarged flow design deficiencies, and making overall performance of the pump better. The experimental results of a low specific speed centrifugal pump impeller designed by proposed method show that pump high efficiency range is extended, the hump phenomenon is eliminated, and shaft power overload phenomenon has been resolved.

Rotating Cavitation in a Centrifugal Pump Impeller of Low Specific Speed

2002 ◽  
Vol 124 (2) ◽  
pp. 356-362 ◽  
Author(s):  
Jens Friedrichs ◽  
Gu¨nter Kosyna
Keyword(s):  
Centrifugal Pump ◽  
High Speed ◽  
Incidence Angle ◽  
Normal Operation ◽  
Pump Impeller ◽  
Wide Range ◽  
Low Specific Speed ◽  
Specific Speed ◽  
Cavity Closure ◽  
Operating Points

The paper describes an experimental investigation of two similar centrifugal pump impellers of low specific speed. Both impellers show rotating cavitation over a wide range of part load operating points. The occurrence of this phenomenon produces a characteristic shape of creeping head-drop compared to the more usual sudden head-drop at “normal” operation points. The onset of rotating cavitation can be assigned to a certain value of the parameter σ/2α meaning the cavity volume in relation to the incidence angle. Optical analysis by video and high-speed camera techniques illustrates the development of this instability mechanism which is mainly driven by an interaction of the cavity closure region and the following blade. Combining these observations and the results of a fourier-transformation the characteristic propagation frequencies of rotating cavitation can be presented for one impeller.

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