scholarly journals Internal Flow Measurement with LDV at Design Point of Contra-Rotating Axial Flow Pump

2008 ◽  
Vol 74 (741) ◽  
pp. 1091-1097 ◽  
Author(s):  
Toru SHIGEMITSU ◽  
Akinori FURUKAWA ◽  
Satoshi WATANABE ◽  
Kusuo OKUMA ◽  
Junichiro FUKUTOMI
Keyword(s):  
Flow Measurement ◽  
Axial Flow ◽  
Internal Flow ◽  
Design Point ◽  
Axial Flow Pump ◽  
Flow Pump

scholarly journals Internal Flow Measurement with LDV at Design Point of Contra-Rotating Axial Flow Pump

2009 ◽  
Vol 4 (3) ◽  
pp. 723-734 ◽  
Author(s):  
Toru SHIGEMITSU ◽  
Akinori FURUKAWA ◽  
Satoshi WATANABE ◽  
Kusuo OKUMA ◽  
Junichiro FUKUTOMI
Keyword(s):  
Flow Measurement ◽  
Axial Flow ◽  
Internal Flow ◽  
Design Point ◽  
Axial Flow Pump ◽  
Flow Pump

Flow Measurement at Partial Flow Rate With LDV Around Rear Rotor of Contra-Rotating Axial Flow Pump

2007 ◽  
Author(s):  
Shuichi Yamashita ◽  
Satoshi Watanabe ◽  
Kusuo Okuma ◽  
Kyota Shirasawa ◽  
Akinori Furukawa
Keyword(s):  
Flow Field ◽  
Flow Rate ◽  
Flow Measurement ◽  
Axial Flow ◽  
Internal Flow ◽  
Stable Operation ◽  
Pressure Measurements ◽  
Specific Speed ◽  
Axial Flow Pump ◽  
Flow Pump

An application of contra-rotating rotors, in which a rear rotor is employed in tandem with a front one and these rotors rotate in the opposite direction each other, has been proposed against a demand for developing higher specific speed axial flow pump. The internal flow field of pump should be considered in the design for higher performance and more stable operation. The flow field in contra-rotating axial flow pump was measured with LDV and wall pressure measurements. In the present paper, the experimental results are shown and the flow behaviors would be discussed.

Interrelationship Between the Efficiency Characteristics and the Pressure Head Gradients Among Axial Flow Pumps

1996 ◽  
Author(s):  
Takaharu Tanaka
Keyword(s):  
Cross Section ◽  
Flow Rate ◽  
Axial Flow ◽  
Internal Flow ◽  
Pressure Head ◽  
Design Flow ◽  
Discharge Valve ◽  
Head Gradient ◽  
Axial Flow Pump ◽  
Flow Pump

There is a correlation between the efficiency of the pump to the head produced. On the axial flow pump, whose efficiency characteristic is favorable, the pressure head gradient between the impeller inlet and the outlet sections, at an equivalent flow rate, may become larger than that for the less favorable axial flow pump. This fundamental interrelation may be held in the flow passage regardless to the flow rate whichever they are operated at design or off design flow rate. There may be a direct correlation between the efficiency of an axial flow pump and the ratio of the discharge valve cross section divided by the pipeline cross section. The smaller this ratio is the better the pressure head gradient is for the same flow rates. This ratio may be useful to estimate relative grade of heads, pressure head gradients, internal flow conditions, and efficiency characteristics among axial flow pumps.

1713 The Internal Flow of Contra-rotating Axial Flow Pump at Partial Flow Rate

2008 ◽  
Vol 2008.2 (0) ◽  
pp. 67-68
Author(s):  
Yusuke TSUNENARI ◽  
Akinori FURUKAWA ◽  
Satoshi WATANABE ◽  
Kusuo OKUMA ◽  
Satoshi USAMI
Keyword(s):  
Flow Rate ◽  
Axial Flow ◽  
Internal Flow ◽  
Axial Flow Pump ◽  
Flow Pump

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 Flow Measurement with LDV Around Rear Rotor of Contra-Rotating Axial Flow Pump at Partial Flow Rate

2008 ◽  
Vol 74 (740) ◽  
pp. 850-855 ◽  
Author(s):  
Satoshi WATANABE ◽  
Shuichi YAMASHITA ◽  
Yusuke TSUNENARI ◽  
Kusuo OKUMA ◽  
Akinori FURUKAWA
Keyword(s):  
Flow Rate ◽  
Flow Measurement ◽  
Axial Flow ◽  
Axial Flow Pump ◽  
Flow Pump

Flow Characteristics of High-Efficient Axial Flow Pump System

2015 ◽  
Author(s):  
Chao Liu ◽  
Fan Yang ◽  
Yan Jin ◽  
Hua Yang
Keyword(s):  
Flow Characteristics ◽  
Axial Flow ◽  
Internal Flow ◽  
Operating Conditions ◽  
Optimum Operating ◽  
Hydraulic Loss ◽  
Pump System ◽  
High Efficient ◽  
Axial Flow Pump ◽  
Flow Pump

Three-dimensional flow-fields in a high-efficient axial flow pump system were simulated by CFD to further study the internal flow characteristics. The internal flow patterns of the pump system were obtained at large, small and optimum operating conditions. The highest efficiency of pump system measured and calculated are 82.57% and 81% respectively at blade angle 0°. For the suction passage, the axial velocity distribution uniformity reach 97.51%, and the hydraulic loss is 0.039m, the pipe efficiency calculated is 98.5% at the optimum operating conditions. The maximum velocity is 1.429 m/s in the range of operating conditions, which meet the requirement of National standard. The performances predicted were compared with measurement results. It was found that the calculated results agree well with the measured results. The overall flow pattern of the pump system is uniform and smooth, and the hydraulic loss is very small which gives the excellent hydraulic performances of pump system.

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