Numerical simulation of pressure fluctuations in an axial-flow pump

To make the submersible axial flow pump have better performance, it is very significant to know about the flowing distributions. Based on N-S equations and Standard turbulence model and SIMPLE algorithm, a CFD analysis was made of the full flow passage in this type of pump. The study result shows the flow rule and will provide a guide for the designing and the producing practice.

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Numerical simulation of water flow in an axial flow pump with adjustable guide vanes

Journal of Mechanical Science and Technology ◽

10.1007/s12206-010-0212-z ◽

2010 ◽

Vol 24 (4) ◽

pp. 971-976 ◽

Cited By ~ 13

Author(s):

Zhongdong Qian ◽

Yan Wang ◽

Wenxin Huai ◽

Youngho Lee

Keyword(s):

Numerical Simulation ◽

Water Flow ◽

Axial Flow ◽

Guide Vanes ◽

Axial Flow Pump ◽

Flow Pump

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Investigation on the Horn-Like Vortices in Stator Corner Separation Flow in an Axial Flow Pump

Journal of Fluids Engineering ◽

10.1115/1.4046376 ◽

2020 ◽

Vol 142 (7) ◽

Author(s):

Chaoyue Wang ◽

Fujun Wang ◽

Yuan Tang ◽

Benhong Wang ◽

Zhifeng Yao ◽

...

Keyword(s):

Guide Vane ◽

Pressure Fluctuations ◽

Axial Flow ◽

Maximum Amplitude ◽

Separation Flow ◽

Suction Surface ◽

Corner Separation ◽

Axial Flow Pump ◽

Velocity Moment ◽

Flow Pump

Abstract Stator corner separation flow existing in the guide-vane domain has significant effects on the characteristics of an axial-flow pump. The objective of this paper is to investigate the vortical structures in stator corner separation flow. Transient numerical simulation with a proof experiment was conducted for an axial-flow pump. Structural features of the vortices and their effects on velocity moment attenuation and pressure fluctuations in the guide-vane domain were analyzed. Horn-like vortices are found in the stator corner separation flow. A full cycle of the horn-like vortex evolution, “inception-growth-development-decay,” is presented. During this transit process, the vortex tube is gradually elongated and deformed, which forms an oblique separation line on the vane suction surface. High velocity moment always exists in the flow passages of the guide-vane domain, and the uniformity of main flows is gradually reduced. Meanwhile, periodic pressure fluctuations arise. The maximum amplitude of pressure fluctuations in the flow passages occurs in the region where the horn-like vortex cores at the “growth” stage lie in, which is approximately 3.39 times higher than that in the vaneless region between the impeller and guide-vane. The dominant frequency of pressure fluctuations in the flow passages is approximately 0.75 times the rotating frequency, which is close to the frequency of the full cycle of the horn-like vortex evolution. Horn-like vortices have remarkable effects on the flow fields, and more attention should be paid to them.

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