Research on pressure fluctuation characteristics of a centrifugal pump with guide vane

Yong, Wang; Luo, Kaikai; Wang, Kai; Liu, Houlin; Liu, Yu; He, Xianghui

doi:10.21595/jve.2017.18830

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…Wang [4] took two-vane pump as the research object and applied particle swarm optimization algorithm to search and calculate the pump, and the hydraulic performance of the pump was improved after optimization. Wang [5] took guide vane centrifugal pump as the optimization objective and proposed an optimization method based on particle swarm optimization algorithm, which effectively improved the flow separation between guide vane and blade. Miao [6] adopted an optimization design method combining neural network and genetic algorithm in the optimization process of centrifugal pump blade profile, which effectively improved the pump operating efficiency at working conditions.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Centrifugal Pump Impeller Based on Neural Network and NSGA-II Algorithm

Wei,

Wensheng,

Lei

et al. 2024

J. Phys.: Conf. Ser.

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This article focuses on the multistage centrifugal pump secondary impeller as the research object, and the two performance parameters of head and efficiency are taken as the optimization objectives. Firstly, the range analysis of significant influence degree of impeller geometric parameters was carried out by partial factor test method. The blade inlet angle at the front and rear cover boards of the impeller, blade outlet angle and blade wrap angle as the optimization variables, two optimization schemes with different blade numbers were proposed. On this basis, the optimal Latin hypercube sampling method was used to extract samples from the two schemes, CFD technology was used to calculate the corresponding target value of each sample, BP neural networks with different structures were used to train the samples, and the agent model with the highest prediction accuracy was optimized as the population evaluation function of NSGA-II algorithm to search for optimization. The results show that the pump performance parameters have been improved after optimization of Scheme II, and the flow of the internal flow field conforms to the law. Finally, through the experimental verification, the optimized centrifugal pump head and efficiency increased by 3.21m and 3.05%.

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Section: Introductionmentioning

confidence: 99%

Optimization of Centrifugal Pump Impeller Based on Neural Network and NSGA-II Algorithm

Wei,

Wensheng,

Lei

et al. 2024

J. Phys.: Conf. Ser.

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show abstract

“…Through CFD simulation, it is found that blade passing frequency and its higher harmonics dominate the downstream of impeller due to the rotor-stator interaction between impeller and guide vane or cut-water. [24][25][26] The corresponding strength of blade passing frequency is affected by the position of cut-water and the distance between impeller outlet and guide vane or cut-water (gap of vaneless region). 27,28 Current studies have shown that the gap of vaneless region changes due to eccentricity can affect rotor-stator interaction and the stability of flow.…”

Section: Introductionmentioning

confidence: 99%

Influence of eccentric impeller on pressure pulsation of large-scale vaned-voluted centrifugal pump

Tao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Large-scale vaned-voluted centrifugal pump is a key component in water conveyance engineering. Hydraulic performance and pressure pulsation are important assessment indicators for operation efficiency and stability. During the common operation, the impeller eccentricity is easy to occur due to installation error, radial force and other reasons, which results the changes of hydraulic performance and pressure pulsation. In this study, the hydraulic performance and pressure pulsation in the vaneless region are analyzed by computational fluid dynamics method. The influence of eccentric impeller on the hydraulic performance in each components and the pressure pulsation is studied. Results show that the eccentric impeller causes the increasing of hydraulic dissipation especially in the volute. However, decreasing of the hydraulic dissipation happens in the draft tube. Impeller eccentricity significantly enhances the amplitude of rotation frequency, but has no obvious effect on the blade passing frequency and its harmonics. The peak-peak value of pressure pulsation of eccentric impeller increases rapidly with the eccentricity ratio. The results of this study provide scientific support for solving the stability problem caused by eccentric impeller in engineering cases.

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“…Jiang's method was more accurate in calculating the structural vibration caused by fluid excitation. Wang [14] calculated the pressure pulsation of the pump chamber, guide vane, impeller, and volute of a centrifugal pump via numerical calculations and compared the results with an experiment. He [15] established a finite element model of a pump unit including a motor.…”

Section: Introductionmentioning

confidence: 99%

Study on Vibration Characteristics of Marine Centrifugal Pump Unit Excited by Different Excitation Sources

Dai

Zhang

Pan

et al. 2021

JMSE

Self Cite

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In order to study the vibration mechanism of a marine centrifugal pump unit and explore the contribution of vibration caused by different vibration excitation sources, a marine centrifugal pump with a specific speed of 66.7 was used for research. A numerical calculation model of the flow field and electromagnetic field of the pump unit was established to analyze the frequency spectrum characteristics and contribution of pump unit vibration caused by different excitation sources. Using the modal superposition method, the vibration characteristics of the pump unit caused by fluid excitation and electromagnetic excitation were analyzed. The results show that the main frequency of pump unit vibration caused by fluid excitation was at the 1× blade passing frequency. The main frequency of pump unit vibration caused by electromagnetic excitation was at the 2× utility frequency. The contribution of different excitation sources to the vibration of marine centrifugal pump unit was in the following order: fluid excitation on the inner surface of the pump electromagnetic excitation fluid excitation in the impeller.

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Research on pressure fluctuation characteristics of a centrifugal pump with guide vane

Cited by 8 publications

References 10 publications

Optimization of Centrifugal Pump Impeller Based on Neural Network and NSGA-II Algorithm

Optimization of Centrifugal Pump Impeller Based on Neural Network and NSGA-II Algorithm

Influence of eccentric impeller on pressure pulsation of large-scale vaned-voluted centrifugal pump

Study on Vibration Characteristics of Marine Centrifugal Pump Unit Excited by Different Excitation Sources

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