Evaluation of Flow-Induced Dynamic Stress and Vibration of Volute Casing for a Large-Scale Double-Suction Centrifugal Pump

Wang, Fujun; Qu, Li-Xia; He, Liwen; Gao, J Y

doi:10.1155/2013/764812

Cited by 15 publications

(17 citation statements)

References 8 publications

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“…Wang [6] carried out the transient analysis to investigate the dynamic stress and vibration of volute casing for a large double-suction centrifugal pump by using the transient fluid-structure interaction theory. The results revealed that, for all operating conditions, the maximum stress located at the volute tongue region, whereas the maximum vibration displacement happened close to the shaft hole region, and the blade passing frequency and its harmonics were dominant in the variations of dynamic stress and vibration displacement.…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition

2019

Mathematical Problems in Engineering

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To investigate the unsteady flow characteristics and their influence mechanism in the volute of centrifugal pump, the Reynolds time-averaged N-S equation, RNG k-ε turbulence model, and structured grid technique are used to numerically analyze the transient flow-field characteristics inside the centrifugal pump volute. Based on the quantified parameters of flow field in the volute of centrifugal pump, the velocity mode contours and oscillation characteristics of the mid-span section of the volute of centrifugal pump are obtained by dynamic mode decomposition (DMD) for the nominal and low flow-rate condition. The research shows that the first-order average flow mode extracted by DMD is the dominant flow structure in the flow field of the volute. The second-order and third-order modes are the most important oscillation modes causing unsteady flow in the volute, and the characteristic frequency of the two modes is consistent with the blade passing frequency and the 2x blade passing frequency obtained by the fast Fourier transform (FFT). By reconstructing the internal flow field of the volute with the blade passing frequency for the nominal flow-rate condition, the periodic variation of the unsteady flow structure in the volute under this frequency is visually reproduced, which provides some ideas for the study of the unsteady structure in the internal flow field of centrifugal pumps.

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Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition

2019

Mathematical Problems in Engineering

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“…Due to the back-to-back arrangement of the twin impellers, the average axial force in double-suction pumps is zero. However, these pumps usually involve high energies and suffer from more complex pressure fluctuations than other centrifugal pumps [1,2]. The inlet fluid is separated by the two suctions and flows into impellers, where the two fluids are independent of each other.…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics in Volute of a Double-Suction Centrifugal Pump with Different Impeller Arrangements

et al. 2019

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As an important type of centrifugal pump, the double-suction pump has been widely used due to its high efficiency region and large flow rate. In the present study, the complex flow in volute of a double-suction centrifugal pump is investigated by numerical simulation using a re-normalization group (RNG) k-ε model with experimental validation. Axial flows are observed in volute near the impeller outlet and compared with four staggered angles. The net area-weighted average axial velocities decrease as the staggered angle increases. The axial flows are mainly caused by the different circumferential pressure distribution at the twin impeller outlet. The dominant frequencies of the axial velocities for different staggered angles are fBP and its harmonic. The pressure fluctuations in most regions of the volute are obtained by superimposing the pressure generated by the two impellers.

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“…Results showed that the sound pressure effect on the structure of the centrifugal pump was not significant. Wang et al 13 studied the vibration and dynamic stress of volute casting for a centrifugal pump, based on the transient fluid-structure interaction theory.…”

Section: Introductionmentioning

confidence: 99%

Vibration control of a marine centrifugal pump using floating raft isolation system

Liu

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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In order to study the influence of floating raft isolation system (FRIS) on the vibration characteristics of marine pump, a marine centrifugal pump with/without FRIS under the same operation condition, which specific speed is 66.7, was experimentally measured. The maximum efficiency of the pump is 75.8%, which is under 1.2 Qd. Results show that the characteristic frequencies in the vibration spectrums of the pump with/without FRIS are APF (axial passing frequency), the BPF (blade passing frequency) and its high-order harmonic frequency. After installing FRIS, under 0.8 Qd, 1.0 Qd and 1.2 Qd, the vibration intensity of the pump at inlet flange is slighter than that at pump base and larger than that at pump bracket. The vibration intensity at outlet flange is slighter than that at the pump bracket and larger than that at pump body, and the vibration intensity at connecting plate is the lowest. The vibration velocity level of pump base decreases with the increase of flow rate, the maximum vibration intensity at M1–M4 is reduced by 88% than that without FRIS, and the maximum vibration velocity of the APF at M1–M4 is reduced by 83.3% than that without FRIS.

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Evaluation of Flow-Induced Dynamic Stress and Vibration of Volute Casing for a Large-Scale Double-Suction Centrifugal Pump

Cited by 15 publications

References 8 publications

Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition

Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition

Flow Characteristics in Volute of a Double-Suction Centrifugal Pump with Different Impeller Arrangements

Vibration control of a marine centrifugal pump using floating raft isolation system

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