scholarly journals A Numerical Study on Axial Pump Performance for Large Cavitation Tunnel Operation

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1523
Author(s):  
Jung-Kyu Choi ◽  
Hyoung-Tae Kim ◽  
Chang-Sup Lee ◽  
Seung-Jae Lee
Keyword(s):  
Numerical Study ◽  
Flow Characteristics ◽  
Axial Flow ◽  
Pressure Jump ◽  
Axial Pump ◽  
Cavitation Tunnel ◽  
Axial Flow Pump ◽  
Operating Points ◽  
Flow Pump ◽  
Good Agreement

In this paper, a numerical investigation was carried out on the performances of a designed axial flow pump for a large cavitation tunnel. From this, the flow characteristics, force, and torque performance of the axial flow pump were investigated, and the rotating speeds of the impeller satisfying the test section speed performances required in the large cavitation tunnel were estimated. The axial flow pump was modeled such that the impeller, stator, and nacelle were located in a cylindrical tunnel. The calculations were carried out for incompressible steady-state turbulent flow considering the impeller rotating. The performance of the pump was confirmed, finding that the head gain was caused by the pressure jump downstream of the pump. The performance of the stator was confirmed to be good enough to refine the tangential flow due to the impeller rotating. To investigate the operating performance of the large cavitation tunnel, the head loss of the entire tunnel without the pump was obtained from a numerical analysis. The operating points were estimated from the specific speed–head coefficient curves, and it was found that the present numerical results were in good agreement with the experiments.

Numerical study on the internal flow characteristics of an axial-flow pump under stall conditions

2018 ◽  
Vol 32 (10) ◽  
pp. 4683-4695 ◽  
Author(s):  
Kan Kan ◽  
Yuan Zheng ◽  
Yujie Chen ◽  
Zhanshan Xie ◽  
Guang Yang ◽  
...  
Keyword(s):  
Numerical Study ◽  
Flow Characteristics ◽  
Axial Flow ◽  
Internal Flow ◽  
Axial Flow Pump ◽  
Flow Pump

The Effect of the Thickness and Angle of the Inlet and Outlet Guide Vane on the Performance of Axial-Flow Pump

2016 ◽  
Author(s):  
Sang-Won Kim ◽  
Youn-Jea Kim
Keyword(s):  
Numerical Analysis ◽  
Numerical Study ◽  
Guide Vane ◽  
Axial Flow ◽  
Inlet Guide Vane ◽  
Guide Vanes ◽  
Pump Performance ◽  
Blade Thickness ◽  
Axial Flow Pump ◽  
Flow Pump

An axial-flow pump has a relatively high discharge flow rate and specific speed at a relatively low head and it consists of an inlet guide vane, impeller, and outlet guide vane. The interaction of the flow through the inlet guide vane, impeller, and outlet guide vane of the axial-flow pump has a significant effect on its performance. Of those components, the guide vanes especially can improve the head and efficiency of the pump by transforming the kinetic energy of the rotating flow, which has a tangential velocity component, into pressure energy. Accordingly, the geometric configurations of the guide vanes such as blade thickness and angle are crucial design factors for determining the performance of the axial-flow pump. As the reliability of Computational Fluid Dynamics (CFD) has been elevated together with the advance in computer technology, numerical analysis using CFD has recently become an alternative to empirical experiment due to its high reliability to measure the flow field. Thus, in this study, 1,200mm axial-flow pump having an inlet guide vane and impeller with 4 blades and an outlet guide vane with 6 blades was numerically investigated. Numerical study was conducted using the commercial CFD code, ANSYS CFX ver. 16.1, in order to elucidate the effect of the thickness and angle of the guide vanes on the performance of 1,200mm axial-flow pump. The stage condition, which averages the fluxes between interfaces and is accordingly appropriate for the evaluation of pump performance, was adopted as the interface condition between the guide vanes and the impeller. The rotational periodicity condition was used in order to enable a simplified geometry to be used since the guide vanes feature multiple identical regions. The shear stress transport (SST) k-ω model, predicting the turbulence within the flow in good agreement, was also employed in the CFD calculation. With regard to the numerical simulation results, the characteristics of the pressure distribution were discussed in detail. The pump performance, which will determine how well an axial-flow pump will work in terms of its efficiency and head, was also discussed in detail, leading to the conclusion on the optimal blade thickness and angle for the improvement of the performance. In addition, the total pressure loss coefficient was considered in order to investigate the loss within the flow paths depending on the thickness and angle variations. The results presented in this study may give guidelines to the numerical analysis of the axial-flow pump and the investigation of the performance for further optimal design of the axial-flow pump.

scholarly journals Software for hydraulic design of axial-flow pump impellers and its manufacturing documentations

2021 ◽  
Vol 345 ◽  
pp. 00016
Author(s):  
László Kalmár ◽  
György Hegedűs ◽  
Árpád Fáy ◽  
Norbert Szaszák
Keyword(s):  
3D Printing ◽  
Axial Flow ◽  
Design Procedure ◽  
The Body ◽  
Pressure Distributions ◽  
Axial Pump ◽  
Singularity Method ◽  
Hydraulic Design ◽  
Axial Flow Pump ◽  
Flow Pump

This article presents a hydraulic design procedure for axial-flow pump impellers, followed by their manufacturing documentations, all in one easy-to-use software named AXPHD V2.0 (AXial Pump Hydraulic Design) developed by one of the authors (Kalmár). After the user determined pump duty, the software offers input data which may be changed interactively. The hydrodynamic singularity method is used to compute the blade profiles on cylindrical surfaces. If the velocity and pressure distributions are accepted, then the body model of the impeller is produced by AUTODESK INVENTOR PROFESSIONAL 2019. Full manufacturing documentation is prepared including shop-drawings for traditional production, numeric modules for CAM, and files for 3D printing. A photo of an impeller made by 3D printing closes the paper.

scholarly journals Effect of Tip Clearance on Helico-Axial Flow Pump Performance at Off-Design Case

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1653
Author(s):  
Nengqi Kan ◽  
Zongku Liu ◽  
Guangtai Shi ◽  
Xiaobing Liu
Keyword(s):  
Optimization Design ◽  
Flow Characteristics ◽  
Axial Flow ◽  
Leading Edge ◽  
Tip Clearance ◽  
Hydraulic Loss ◽  
Tip Leakage Flow ◽  
Tip Leakage ◽  
Axial Flow Pump ◽  
Flow Pump

To reveal the effect of tip clearance on the flow behaviors and pressurization performance of a helico-axial flow pump, the standard k-ε turbulence model is employed to simulate the flow characteristics in the self-developed helico-axial flow pump. The pressure, streamlines and turbulent kinetic energy in a helico-axial flow pump are analyzed. Results show that the tip leakage flow (TLF) forms a tip-separation vortex (TSV) when it enters the tip clearance and forms a tip-leakage vortex (TLV) when it leaves the tip clearance. As the blade tip clearance increases, the TLV moves along the blade from the leading edge (LE) to trailing edge (TE). At the same time, the entrainment between the TLV and the main flow deteriorates the flow pattern in the pump and causes great hydraulic loss. In addition, the existence of tip clearance also increases the possibility of TLV cavitation and has a great effect on the pressurization performance of the helico-axial flow pump. The research results provide the theoretical basis for the structural optimization design of the helico-axial flow pump.

0427 Partial flow characteristics of contra-rotating axial flow pump with reduced speed rear rotor design

2013 ◽  
Vol 2013 (0) ◽  
pp. _0427-01_-_0427-03_
Author(s):  
Hironori HONDA ◽  
Hiroaki YOSHIMURA ◽  
Linlin CAO ◽  
Satoshi WATANABE ◽  
Akinori FURUKAWA
Keyword(s):  
Flow Characteristics ◽  
Axial Flow ◽  
Rotor Design ◽  
Axial Flow Pump ◽  
Flow Pump

Numerical Study on Loss Mechanism in Rear Rotor of Contra-Rotating Axial Flow Pump

2020 ◽  
Vol 13 (1) ◽  
pp. 241-252 ◽  
Author(s):  
De Zhang ◽  
Yusuke Katayama ◽  
Satoshi Watanabe ◽  
Shin-Ichi Tsuda ◽  
Akinori Furukawa
Keyword(s):  
Numerical Study ◽  
Axial Flow ◽  
Loss Mechanism ◽  
Axial Flow Pump ◽  
Flow Pump

A Numerical Study on the Performance Improvement of Guide Vanes in an Axial-flow Pump

2012 ◽  
Vol 15 (6) ◽  
pp. 58-63 ◽  
Author(s):  
Hyun-Chang Park ◽  
Sung Kim ◽  
Joon-Yong Yoon ◽  
Young-Seok Choi
Keyword(s):  
Performance Improvement ◽  
Numerical Study ◽  
Axial Flow ◽  
Guide Vanes ◽  
Axial Flow Pump ◽  
Flow Pump
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