Comparative studies on air borne noise and flow induced noise of a double suction centrifugal pump

Gangipamula, Rajavamsi; Ranjan, Pritanshu; Patil, Ranjit S.

doi:10.1016/j.apacoust.2022.109148

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…Al‐Obaidi 12 analysed the principle of cavitation in a centrifugal pump, proposed the use of vibration technology to detect cavitation in a centrifugal pump, and obtained the influence law of cavitation under different flow rates and pump speed, which had significant value in reducing the internal vibration and noise of the centrifugal pump. Gangipamula et al 13 compared and analysed the airborne noise and flow‐induced noise of the double‐suction centrifugal pump. The vibration frequencies at different outlet flow speeds were optimised by separate vortex simulation and fast Fourier transform.…”

Section: Introductionmentioning

confidence: 99%

The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

Wang,

Liu,

Cao

2024

Energy Science & Engineering

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To study the influence of the blade curvature radius on the flow‐induced vibration and noise of the centrifugal pump, the internal sound field of the IS 80‐65‐160 centrifugal pump was numerically calculated by adjusting the blade wrap angles to change the blade curvature radius. The RNG (Reynolds Time Average Simulation) turbulence model was selected for the numerical calculation of the centrifugal pump. The numerical simulation of the whole flow channel of the centrifugal pump was carried out using Ansys Fluent software, and the external characteristic curve of the centrifugal pump was obtained. The influence of different blade wrap angles on the internal pressure, velocity and Turbulent Kinetic Energy of the centrifugal pump was obtained. On the basis of the sound–structure coupling equation, the unsteady sound field of the centrifugal pump was calculated, and the time domain and frequency domain characteristics of the pressure pulsation at each monitoring point were obtained. The calculation results showed that the dynamic and static interference between the impeller and the volute tongue mainly caused the vibration of the centrifugal pump. By appropriately increasing the blade wrap angles, the pressure pulsation in the volute fluid domain could be effectively reduced. The vibration and noise test bench of the centrifugal pump was set up to verify the test. The experimental results showed that at the double‐blade frequency, the variation trend of the experimental value and the simulated value of the outflow flow‐induced noise of the centrifugal pump were consistent, which verified the accuracy of the sound field simulation calculation. When the blade wrap angle , it could effectively reduce the internal sound pressure level and the flow‐induced vibration and noise of the centrifugal pump. By adopting measures such as grid encryption at the position of the tongue, nonstationary calculation and comparison of different turbulence models, the accuracy of the calculation results of the internal flow field and sound field of the centrifugal pump is effectively improved, and the accuracy and reliability of the experimental results are ensured. The above research results had certain reference significance and application value for improving the working efficiency of centrifugal pumps and reducing flow‐induced vibration and noise.

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Section: Introductionmentioning

confidence: 99%

The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

Wang,

Liu,

Cao

2024

Energy Science & Engineering

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“…The studies on internal discrete noise mainly focus on reducing the noise generated by the dynamic and static interference between the impeller and the stationary components. Rajavamsi Gangipamula et al [8] investigated the correlation between flow noise and air noise of the centrifugal pump through an experimental and numerical study of a double suction impeller volute pump. It was found that the volute tongue has a great influence on the flow noise and air noise of the centrifugal pump.…”

Section: Introductionmentioning

confidence: 99%

Research on the Hydrodynamic Noise Characteristics of a Mixed-Flow Pump

Yang,

Li,

et al. 2023

JMSE

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This study presents a comprehensive investigation of the internal noise characteristics of a mixed-flow pump by combining computational fluid dynamics (CFD) and computational acoustics. The turbulent flow field of the pump is simulated using the unsteady SST k-ω turbulence model in CFD. The contributions of the volute, guide vanes, and impeller to the internal noise are analyzed and compared using the Lighthill theory, FW-H formula, and LMS Virtual Lab software for acoustic simulation. The research findings indicate that the energy of pressure fluctuations in the mixed-flow pump is predominantly concentrated at the blade passing frequency and its low-frequency harmonics. This suggests that the internal noise is mainly in the low-frequency range, with higher energy at the blade passing frequency and its harmonics. Under the 0.6Qdes flow condition, the flow inside the pump becomes more complex, resulting in higher sound pressure levels and sound power levels compared to higher flow conditions. However, for flow conditions ranging from 0.8Qdes to 1.2Qdes, the sound pressure levels gradually increase with increasing flow rate, with the sound pressure level at 1.0Qdes being nearly identical to that at 1.2Qdes. The analysis of sound power level spectra at different flow rates reveals that the distribution characteristics of internal vortex structures directly impact the hydrodynamic noise inside the mixed-flow pump. These research findings provide a significant theoretical basis for noise control in mixed-flow pumps.

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Induced noise of impeller stuck and passive rotation state in multi-stage pump without power drive under natural flow conditions

Zhou,

Liu,

Hua

et al. 2023

J Hydrodyn

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Comparative studies on air borne noise and flow induced noise of a double suction centrifugal pump

Cited by 5 publications

References 23 publications

The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

Research on the Hydrodynamic Noise Characteristics of a Mixed-Flow Pump

Induced noise of impeller stuck and passive rotation state in multi-stage pump without power drive under natural flow conditions

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