Experimental Analysis on Pressure Fluctuation Characteristics of a Centrifugal Pump with Vaned-Diffuser

Liu, Houlin; Xia, Ruichao; Wang, Kai; Jing, Yu-cheng; He, Xianghui

doi:10.3390/w12010126

Cited by 9 publications

(4 citation statements)

References 14 publications

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“…Wang [4] studied multi-stage centrifugal pumps, while the pressure fluctuation in the diffuser originates from the outlet side of the impeller blades. Liu [5] conducted experimental research. Tan [6] analyzed the flow field under partial load of a centrifugal pump, the main frequency and amplitude of pressure pulsation increased as the cavitation phenomenon worsened.…”

Section: Introductionmentioning

confidence: 99%

Characteristic analysis of pressure fluctuation of the super large flow and high-power centrifugal pump during transient processes of the start-up and shutdown

Liu,

Ma,

Zhao

et al. 2024

J. Phys.: Conf. Ser.

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The transient flow field of a super large flow and high-power centrifugal pump during start-up and shutdown is relatively complex and related to the safe and stable operation of the entire water conveyance system. In this study, we conducted a deep analysis of the start-up and shutdown transient processes of a large flow and high-power centrifugal pump. To realize the numerical simulation for the start-up and shutdown transient processes, we used the fluid dynamics calculation and analysis software STAR CCM+. The pressure at multiple monitoring points in the impeller, between stay vanes and impeller, volute, and suction pipe was monitored. In addition, FFT analysis method was used to conduct frequency domain analysis of the pressure at the monitoring points. The changing trend of pressure fluctuation mixing amplitude in the transient processes was discussed. This study provides scientific basis for the safe and stable operation of pump stations.

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Section: Introductionmentioning

confidence: 99%

Characteristic analysis of pressure fluctuation of the super large flow and high-power centrifugal pump during transient processes of the start-up and shutdown

Liu,

Ma,

Zhao

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…This means the two-way pump in operation will produce more serious vibration and noise [14], and if equipped with a two-way axial flow pump the pumping station system security and stability is hugely at risk. In recent years, more and more researchers have pointed out that the pressure pulsation induced by unstable flow in the pump is the most critical factor affecting the safety and stability of the pumping station system [15][16][17][18]. Therefore, it is urgent to study the hydrodynamic characteristics of the bidirectional pump, especially the internal pressure pulsation characteristics.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Internal Pressure Pulsation Characteristics of a Bidirectional Axial Flow Pump Operating in Forward and Reverse Directions

et al. 2022

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A bidirectional axial flow pump can realize bidirectional pumping, which has a wide application prospect in coastal low-head pumping stations and water jet propulsion systems. In this paper, a typical bidirectional axial flow pump is taken as the research object, and the hydraulic model of the bidirectional axial flow pump is manufactured. The hydrodynamic characteristics of the bidirectional axial flow pump are tested on the high-precision hydraulic mechanical test bench, including the positive and negative directions. In the experiment, multiple pressure pulsation monitoring points were arranged in the impeller chamber, and the pressure fluctuations in the pump under a total of 42 flow conditions were measured by a micro pressure pulsation sensor, involving 21 working conditions of forward operation and 21 working conditions of reverse operation. According to the experimental results, the hydrodynamic characteristics, especially the pressure pulsation characteristics in the pump, of the two-way axial flow pump under positive and negative operation are comprehensively compared and analyzed, and the energy characteristics and the propagation law of pressure pulsation of the two-way axial flow pump under positive and negative operation are revealed. The research results provide an important reference for the safe and stable operation of coastal bidirectional axial flow pump stations.

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“…Their results showed that there was large flow loss near the volute tongue passage, and the pressure pulsation at the shaft frequency was the main element affecting vibration stability of pump rotor. Liu et al [11] obtained the conclusion that the rotor-stator interaction in a centrifugal pump was the main cause of the pressure pulsation, and that the pressure pulsation was correlated with the intensity of the secondary flow within the volute. Zhao [12] found that the flow separation appeared around the leading edge of the impeller pressure side and moved along the flow passage in the form of vorticity, and that the interaction between stall vorticity and the volute enhanced the rotor-stator interaction.…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics and Energy Loss of a Multistage Centrifugal Pump with Blade-Type Guide Vanes

Zhai

Guo

et al. 2022

JMSE

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Multistage pumps with blade-type guide vanes are widely used in offshore oil production, the petrochemical and coal-chemical industries, and nuclear power fields for its advantages of large flow rate, high pressure, and excellent operation stability. However, the internal flow of this kind of pump is complex; in particular, the hydraulic, flow, and pressure pulsation characteristics of the different stages are quite different, which has a great impact on the design and performance predictions of this kind of pump. Thus, in this paper, the hydraulic performance, unsteady flow characteristics, evolution of vortex structures and pressure pulsation characteristics in a 10 stage centrifugal pump are investigated numerically. The results show that inverse flow, jet-wake flow, and rotor-stator interaction flow are the key factors causing energy loss and efficiency decline at every stage and in the whole pump. The vortex evolution at the rotor–stator interaction regions is actually the process that the vortex structures fall off and impact on the pressure surface at the leading edge of the guide vane blade at a frequency that equals to the impeller blade passing frequency. Furthermore, under the actions of the guide vane with confluence cavity, the pressure pulsation within the final-stage guide vane contains low-frequency components with large bandwidths, which mainly results from the confluence flow disturbance at the outlet of the cylindrical guide passage.

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Experimental Analysis on Pressure Fluctuation Characteristics of a Centrifugal Pump with Vaned-Diffuser

Cited by 9 publications

References 14 publications

Characteristic analysis of pressure fluctuation of the super large flow and high-power centrifugal pump during transient processes of the start-up and shutdown

Characteristic analysis of pressure fluctuation of the super large flow and high-power centrifugal pump during transient processes of the start-up and shutdown

Experimental Study on the Internal Pressure Pulsation Characteristics of a Bidirectional Axial Flow Pump Operating in Forward and Reverse Directions

Flow Characteristics and Energy Loss of a Multistage Centrifugal Pump with Blade-Type Guide Vanes

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