A Numerical Study on the Performance Analysis of the Mixed Flow Pump for FPSO

This paper describes a numerical study on the improvement of suction performance and hydraulic efficiency of a mixed-flow pump by impellers. The design of these impellers was optimized using a commercial CFD (computational fluid dynamics) code and DOE (design of experiments). The design variables of meridional plane and vane plane development were defined for impeller design. In DOE, variables of inlet part were selected as main design variables in meridional plane, and incidence angle was selected in vane plane development. The verification of the experiment sets that were generated by2kfactorial was done by numerical analysis. The objective functions were defined as the NPSHre (net positive suction head required), total efficiency, and total head of the impellers. The importance of the geometric design variables was analyzed using2kfactorial designs. The interaction between the NPSHre and total efficiency, according to the meridional plane and incidence angle, was discussed by analyzing the2kfactorial design results. The performance of optimally designed model was verified by experiments and numerical analysis and the reliability of the model was retained by comparison of numerical analysis and comparative analysis with the reference model.

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Numerical study of pressure fluctuation in the whole flow passage of a low specific speed mixed-flow pump

Advances in Mechanical Engineering ◽

10.1177/1687814017707651 ◽

2017 ◽

Vol 9 (5) ◽

pp. 168781401770765

Author(s):

Wenwu Zhang ◽

Baoshan Zhu ◽

Zhiyi Yu ◽

Ce Yang

Keyword(s):

Pressure Fluctuation ◽

Numerical Study ◽

Mixed Flow ◽

Flow Passage ◽

Low Specific Speed ◽

Specific Speed ◽

Flow Pump

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Numerical Study of Pressure Fluctuation in a Gas- Liquid Two-Phase Mixed-Flow Pump

Energies ◽

10.3390/en10050634 ◽

2017 ◽

Vol 10 (5) ◽

pp. 634 ◽

Cited By ~ 13

Author(s):

Wenwu Zhang ◽

Zhiyi Yu ◽

Baoshan Zhu

Keyword(s):

Pressure Fluctuation ◽

Numerical Study ◽

Mixed Flow ◽

Two Phase ◽

Flow Pump

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Numerical study on the cavitation phenomenon for the head drop and unsteady bubble patterns with a difference in the incidence angle of a mixed-flow pump

Advances in Mechanical Engineering ◽

10.1177/1687814020914790 ◽

2020 ◽

Vol 12 (4) ◽

pp. 168781402091479 ◽

Cited By ~ 2

Author(s):

Yong-In Kim ◽

Hyeon-Mo Yang ◽

Jun-Won Suh ◽

Sung Kim ◽

Kyoung-Yong Lee ◽

...

Keyword(s):

Numerical Study ◽

Incidence Angle ◽

Experimental Tests ◽

Design Flow ◽

Inlet Pressure ◽

Mixed Flow ◽

Bubble Generation ◽

Cavitation Phenomenon ◽

Suction Performance ◽

Flow Pump

In this study, two types of mixed-flow pump models exhibiting different suction performances were investigated to understand the cavitation characteristics of head drop gradients due to the decrease in inlet pressure. Both models were designed with the same specifications except for the shroud inlet blade angle and inlet radius which directly affect the incidence angle. The steady- and unsteady-state analyses were performed using ANSYS CFX, and the results of both models were compared. Bubble generation and patterns were systemically represented at the design flow rate to observe their influence on suction performance. Furthermore, experimental tests were performed to validate the numerical results. From the results, the head drop gradient can determine the suction performance of mixed-flow pumps. The amount and shape of the bubbles concerning the suction performance of a mixed-flow pump exhibit significant differences with the changes in time and inlet pressure. The patterns of generated bubble are not stable even for each blade.

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