Experimental Investigations on Pressure Fluctuations and Vibration of the Impeller in a Centrifugal Pump with Vaned Diffusers

Guo, Shuxiang; Maruta, Yoshiyuki

doi:10.1299/jsmeb.48.136

Cited by 75 publications

(37 citation statements)

References 15 publications

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“…Shi and Tsukamoto [9] studied pressure fluctuations in the diffuser region by a CFD code STAR-CD. Furthermore, experiments were conducted to measure pressure fluctuations in diffuser radial pumps by Arndt et al [10,11], Furukawa et al [12], Guo and Maruta [13]. All the above-mentioned experimental and numerical investigations contribute to a better understanding of impeller-diffuser interactions in radial diffuser pumps; however the study is still not sufficient; particularly, most research on the unsteady pressure fluctuation has been conducted only in the diffuser region, but less for the impeller region.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Pressure Fluctuations for Different Configurations of Vaned Diffuser Pumps

Feng

Benra

Dohmen

2007

International Journal of Rotating Machinery

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Numerical simulations on impeller-diffuser interactions in radial diffuser pumps are conducted to investigate the unsteady flow, and more attention is paid to pressure fluctuations on the blade and vane surfaces. Calculations are performed at different operating points, different blade number configurations, and different radial gaps between the impeller and diffuser to examine their effects on the unsteady flow. Computational results show that a jet-wake flow structure is observed at the impeller outlet. The biggest pressure fluctuation on the blade is found to occur at the impeller trailing edge, on the pressure side near the impeller trailing edge, and at the diffuser vane leading edge, independent of the flow rate, radial gap, and blade number configuration. All of the flow rate, blade number configuration, and radial gap influence significantly the pressure fluctuation and associated unsteady effects in the diffuser pumps.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Pressure Fluctuations for Different Configurations of Vaned Diffuser Pumps

Feng

Benra

Dohmen

2007

International Journal of Rotating Machinery

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“…Many studies have shown that vibration signals caused by hydraulic factors mainly concentrate in low frequency band [22][23][24]. So vibration signals in low frequency band of two model pumps were investigated to analyze influence of slope volute on vibration characteristic in centrifugal pump.…”

Section: Vibration Characteristics Comparision Of Two Pumpsmentioning

confidence: 99%

Investigation on Vibration Characteristics in a Centrifugal Pump with Special Slope Volute

Zhang

Yang

Gao

et al. 2014

Advances in Mechanical Engineering

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Vibration is one of the main problems which should be considered seriously in designing and operating a centrifugal pump. In this paper, a special slope volute was proposed to reduce vibration level of centrifugal pump. The goal of this paper was to analyze vibration characteristics of slope volute pump and provide a new method to reduce vibration energy in centrifugal pump. Experiments were carried out to obtain vibration signals at different flow rates of slope volute pump, which were compared with conventional spiral volute pump. Results show that vibration level is closely related to flow structure interior pump. At low flow rates, especially, vibration energy increases rapidly with the onset of rotating stall. Rotor-stator interaction mechanism changes when adopting slope volute. In slope volute pump, the peaks in power spectra correspond to different harmonics of BPF at three measuring directions; however, in spiral volute pump, the predominant components always correspond to 2 BPF . From comparison of vibration level in different frequency bands, it is found that vibration level of slope volute pump is smaller than conventional spiral volute pump. So vibration energy of centrifugal pump can be reduced effectively using slope volute.

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“…Too large vibration will affect the reliability of pump operation. Therefore, measures should be taken to reduce the pressure fluctuation in the pump [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Pressure Fluctuation, Vibration, and Noise in a Multistage Pump

Wang

Zhang

Xia³

et al. 2018

Shock and Vibration

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In order to measure the pressure pulsation, vibration, and noise characteristics of multistage centrifugal pump in different flow rates, a five-stage centrifugal pump was chosen as research object. The results show that the main frequency of pressure pulsation was BPF 1 , 9APF, BPF 2 , BPF 2 , and 9APF. According to the order of monitoring points, the intensity of the pressure fluctuation increased and then decreased, with the strongest fluctuation at monitoring point P2. The peak value of pressure fluctuation in monitoring point P2 was obviously higher than the other monitoring points. The main characteristic frequency of vibration is 4APF, BPF 2 , 9APF, 2BPF 2 , 3BPF 1 , 4BPF 1 , and 4BPF 2 . The number of characteristic frequencies at the outlet flange was significantly more than the number of characteristic frequencies at the inlet flange. As the flow rate increased, the vibration of motor gradually increased and the vibration of pump increased at first and then decreased. It reached the minimum vibration level in the design flow rate. Motor contributed the largest amount of noise caused by the pump unit. The noise level of measure point which is close to motor is higher than that of other measure points. As the flow rate increased, the noise incrementally increased, and the difference in noise level between measure points decreased gradationally. When the flow rate was 120 m 3 /h, the maximum difference value of different noise monitoring points was only 1.7 dB.

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Experimental Investigations on Pressure Fluctuations and Vibration of the Impeller in a Centrifugal Pump with Vaned Diffusers

Cited by 75 publications

References 15 publications

Numerical Investigation on Pressure Fluctuations for Different Configurations of Vaned Diffuser Pumps

Numerical Investigation on Pressure Fluctuations for Different Configurations of Vaned Diffuser Pumps

Investigation on Vibration Characteristics in a Centrifugal Pump with Special Slope Volute

Experimental Investigation of Pressure Fluctuation, Vibration, and Noise in a Multistage Pump

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