Effects of the pump-circuit acoustic coupling on the blade-passing frequency perturbations

Keller, Jens; Parrondo, Jorge; Barrio, Raúl; Pastor, Joaquı́n; Blanco, Eduardo

doi:10.1016/j.apacoust.2013.06.009

Cited by 16 publications

(5 citation statements)

References 11 publications

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“…Ding [24] and Si [25] used the combined CFD/ computational acoustics (CA) method to simulate the hydraulic noise of centrifugal pumps. Keller [26] theoretically and experimentally investigated the effects of the pump-circuit acoustic coupling on the blade-passing frequency perturbation induced by fluid-dynamic interaction between the rotor and the stator, which provides some theoretical supports for the above numerical works. By employing the large eddy simulation (LES) and the Ffowcs Williams and Hawkings (FW-H ) acoustic method, Gao [27] concluded that the design operation generates the lowest total sound pressure level.…”

Section: Introductionmentioning

confidence: 84%

Numerical and Experimental Investigation on Radiated Noise Characteristics of the Multistage Centrifugal Pump

Wang

Yuan

et al. 2019

Processes

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The radiated noise of the centrifugal pump acts as a disturbance in many applications. The radiated noise is closely related to the hydraulic design. The hydraulic parameters in the multistage pump are complex and the flow interaction among different stages is very strong, which in turn causes vibration and noise problems because of the strong hydraulic excitation. Hence, the mechanism of radiated noise and its relationship with hydraulics must be studied clearly. In order to find the regular pattern of the radiated noise at different operational conditions, a hybrid numerical method was proposed to obtain the flow-induced noise source based on Lighthill acoustic analogy theory, which divided the computational process into two parts: computational fluid dynamics (CFD) and computational acoustics (CA). The unsteady flow field was solved by detached eddy simulation using the commercial CFD code. The detailed flow information near the surface of the vane diffusers and the calculated flow-induced noise source was extracted as the hydraulic exciting force, both of which were used as acoustic sources for radiated noise simulation. The acoustic simulation employed the finite element method code to get the sound pressure level (SPL), frequency response, directivity, et al. results. The experiment was performed inside a semi-anechoic room with a closed type pump test rig. The pump performance and acoustic parameters of the multistage pump at different flow rates were gathered to verify the numerical methods. The computational and experimental results both reveal that the radiated noise exhibits a typical dipole characteristic behavior and its directivity varies with the flowrate. In addition, the sound pressure level (SPL) of the radiated noise fluctuates with the increment of the flow rate and the lowest SPL is generated at 0.8Qd, which corresponds to the maximum efficiency working conditions. Furthermore, the experiment detects that the sound pressure level of the radiated noise in the multistage pump rises linearly with the increase of the rotational speed. Finally, an example of a low noise pump design is processed based on the obtained noise characteristics.

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Section: Introductionmentioning

confidence: 84%

Numerical and Experimental Investigation on Radiated Noise Characteristics of the Multistage Centrifugal Pump

Wang

Yuan

et al. 2019

Processes

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“…Considering the influence of the entire hydraulic system, this numerical simulation process is very complex. In addition, the working medium is usually considered as the homogeneous and incompressible ideal fluid, so the transmission characteristics and coupling effects of the sound pressure are not considered [9].…”

Section: Introductionmentioning

confidence: 99%

Research on the influence of piping system on the fluid-dynamic noise of centrifugal pump

Mao,

Li,

Zheng

et al. 2024

J. Phys.: Conf. Ser.

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During the experimental research of the fluid-dynamic noise generated by a centrifugal pump, the accurate measurement of its acoustic characteristics can only be achieved when the pump is connected to a pipeline system. If the noise at a specific position of the centrifugal pump or its suction and discharge pipelines is used to directly describe the internal sound source characteristics of the pump during the test, there may be a broad difference in the experimental data depending on the specific system and the measuring position. Therefore, in order to verify the influence of different piping systems on the acoustic characteristics at a certain position of the inlet and outlet pipeline of the centrifugal pump, three different discharge pipeline schemes of the piping system were set up in this study. Meanwhile, this study solved the scattering matrix of a centrifugal pump using experimental methods. This method can be used independently of the testing system to describe the transmission and reflection characteristics at the ports of a centrifugal pump, and accurately solve the acoustic characteristics of the pump itself in future research.

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“…Parrondo et al [13] presented a simple acoustic model for centrifugal pumps that considers ideal sound sources of arbitrary position and properties, concluded that the sound field can be characterized reasonably by a dipole-like source located at the tongue region. Keller et al [14] obtained the influence of different acoustic impedances of the suction side on the pressure fluctuations at the pump by using the matrix formulation acoustic model. Mao et al [15] combined the detached eddy simulation (DES) method and the acoustic boundary element method involved in software LMS to predict the flow-induced noise characterization of pump turbines during a transient load rejection process and intermittent vane closing conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on the Flow-Induced Noise Characteristics of High-Speed Centrifugal Pumps

Shen

et al. 2020

Applied Sciences

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The development of low-noise pumps is essential to design quiet fluid delivery systems. Due to the complicated internal flow, the flow-induced noise characteristics of high-speed centrifugal pumps have not been well understood. Taking engine cooling pumps as an example model, experimental measurements are performed in a semi-anechoic room and a CFD/CFA calculation method is proposed to study the fluid-borne noise and radiated noise characteristics. In the speed range of 5000–6750 r/min, both the pump head and the dimensionless radiated noise characteristics conform to similar laws, and the highest efficiency point pump presents the lowest noise level. Consistent with the experimental results, the predicted radiated noise of the model pump presents dipole characteristics at the required flow rate condition. Moreover, the spectrum of fluid borne noise at pump outlet shows broadband characteristics but with obvious discrete peaks, which are not only related to the fluid pressure pulsation characteristics (6f0 and the multiple) at the low-frequency region, but also to the frequency of the structural mode (3000–6000 Hz region). Rotor-stator interaction of the pump flow field between the impeller and volute is the main reason of flow-induced noise; unstable flow also contributes to the broadband components in the noise spectrum.

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Effects of the pump-circuit acoustic coupling on the blade-passing frequency perturbations

Cited by 16 publications

References 11 publications

Numerical and Experimental Investigation on Radiated Noise Characteristics of the Multistage Centrifugal Pump

Numerical and Experimental Investigation on Radiated Noise Characteristics of the Multistage Centrifugal Pump

Research on the influence of piping system on the fluid-dynamic noise of centrifugal pump

Numerical and Experimental Study on the Flow-Induced Noise Characteristics of High-Speed Centrifugal Pumps

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