Transient flow and noise characteristics of accelerated flow past a hydrofoil with special emphasis on vortex-turbulence-noise interaction

Zhang, J; Huang, Zhenwei

doi:10.1016/j.oceaneng.2022.113427

Cited by 13 publications

(2 citation statements)

References 30 publications

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“…He proposed a research approach that involves first calculating the flow field and then computing the sound field for studying the rotationally induced sound field by machinery. Timushev [30] and others utilized the vorticity acoustic theory to solve the flow-induced noise within a centrifugal pump, and the results demonstrated good agreement with experimental data. In addition to Howe, several researchers [31][32][33][34] have investigated the aerodynamic noise mechanisms from different perspectives.…”

Section: Sound Field Solving Theorymentioning

confidence: 83%

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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Section: Sound Field Solving Theorymentioning

confidence: 83%

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

Yang,

Li,

et al. 2023

JMSE

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“…In acoustic research, the sound waves are generally defined as the propagation of vibrations on the surface of an object. Fluid noise can be classified into monopole, dipole, and quadrupole noise sources based on their causes and effects (Wang et al, 2023b;Zhang and Huang, 2023). Monopole noise is typically generated by uniform or periodic expansion and contraction movements, and its relevant parameters are generally related to the amplitude and phase at each point.…”

Section: Noise Related Theorymentioning

confidence: 99%

Investigation on the flow and induced-noise mechanism during the transient start-up process of a mixed-flow pump

Zhang,

Wang,

Yang

et al. 2024

Self Cite

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PurposeThis study aims to investigate the noise-inducing characteristics during the start-up process of a mixed-flow pump and the impact of different start-up schemes on pump noise.Design/methodology/approachThis study conducted numerical simulations on the mixed-flow pump under different start-up schemes and investigated the flow characteristics and noise distribution under these schemes.FindingsThe results reveal that the dipole noise is mainly caused by pressure fluctuations, while the quadrupole noise is mainly generated by the generation, development and breakdown of vortices. Additionally, the noise evolution characteristics during the start-up process of the mixed-flow pump can be divided into the initial stage, stable growth stage, impulse stage and stable operation stage.Originality/valueThe findings of this study can provide a theoretical basis for the selection of start-up schemes for mixed-flow pumps, reducing flow noise and improving the operational stability of mixed-flow pumps.

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Bionic investigation of a dolphin head-based hydrofoil with emphasis on energy performance and flow characteristics

Zhang

Huang

2023

Ocean Engineering

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Transient flow and noise characteristics of accelerated flow past a hydrofoil with special emphasis on vortex-turbulence-noise interaction

Cited by 13 publications

References 30 publications

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

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

Investigation on the flow and induced-noise mechanism during the transient start-up process of a mixed-flow pump

Bionic investigation of a dolphin head-based hydrofoil with emphasis on energy performance and flow characteristics

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