Influence of start-up modes on the noise characteristics of mixed-flow pump during start-up process

Zhu, Guojun; Xuan, Yifan; Feng, Jianjun; Tang, Zhenbo; Li, Yunzhe; Wang, Like

doi:10.1016/j.ymssp.2024.111388

Mechanical Systems and Signal Processing

2024

DOI: 10.1016/j.ymssp.2024.111388

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Influence of start-up modes on the noise characteristics of mixed-flow pump during start-up process

Guojun Zhu,

Yifan Xuan,

Jianjun Feng

et al.

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2024

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Study on the Transient Flow Characteristics of Multistage Centrifugal Pumps during the Startup Process before System Operation

Chen,

Xu,

Deng

et al. 2024

Water

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Multistage pumps are essential in emergency water supply, irrigation, and other systems undergoing unavoidable hydraulic transitions like pump startup and valve operations. These transitions cause rapid changes in impeller speed, flow rate, and pressure, destabilizing the internal flow field and impacting system reliability. To study transient flow characteristics, a numerical analysis of a three-stage pump was conducted, focusing on vortex identification, entropy production, and time–frequency pressure pulsation. Using the SST turbulence model, the simulation analyzed different start times and flow rate variations. Findings revealed that shorter startup times intensified transient effects, with the head increasing rapidly initially and then stabilizing. Vortex structures showed periodic development and dissipation. Entropy production rose with impeller speed, peaking higher with shorter startups. Blade passing frequency dominated pressure pulsations, with increased low-frequency pulsations as speed rose. During valve opening, flow stabilization accelerated with increasing flow rates, reducing amplitude and eliminating low-frequency components. This research aids the reliable operation of high-pressure pumping systems in energy storage.

show abstract

Study on the Transient Flow Characteristics of Multistage Centrifugal Pumps during the Startup Process before System Operation

Chen,

Xu,

Deng

et al. 2024

Water

View full text Add to dashboard Cite

show abstract

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Influence of start-up modes on the noise characteristics of mixed-flow pump during start-up process

Cited by 1 publication

References 40 publications

Study on the Transient Flow Characteristics of Multistage Centrifugal Pumps during the Startup Process before System Operation

Study on the Transient Flow Characteristics of Multistage Centrifugal Pumps during the Startup Process before System Operation

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