Numerical analysis of the vibration and noise induced by the unsteady flow in a centrifugal compressor

Zhou, Huihui; Mao, Yijun; Diao, Quan; Lu, Fengxia; Zhang, Qunlin

doi:10.1177/0957650916647834

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…Therefore, the disturbances generated from the impeller-diffuser interaction can be greatly suppressed at the compressor inlet and outlet. Moreover, the amplitude of velocity disturbances sampled from C3 is lower about one order of magnitude than that sampled from C30, this result implies that the tonal noise correlated with the blade passing frequency is mainly radiated from the compressor outlet rather than the compressor inlet, and this phenomenon has been observed in previous experimental and numerical studies, such as (Zhou et al, 2016(Zhou et al, , 2018. More analysis on this topic will be performed in Section 4.2.3.…”

Section: Instantaneous Velocity Fieldmentioning

confidence: 73%

Numerical study of wake and potential interactions in a two-stage centrifugal refrigeration compressor

Fan

Zhang

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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Both potential and wake interactions are usually the primary mechanisms related to the unsteadiness in turbomachines. However, it is usually difficult to distinguish their effects on flow evolution. This paper develops a direct and visual method to investigate the effects of wake and potential interactions on features of the flow velocity in a two-stage centrifugal refrigeration compressor. The centrifugal compressor consists of six cascades of blades/vanes, i.e. inlet guide vanes in the first stage, impeller blades and vaned diffusers in both stages and return channel in the second stage. The detailed features of flow velocity, such as time-averaged flow velocity, instantaneous flow velocity and power density spectrum of the flow velocity, downstream each cascade of blades/vanes are studied in detail to investigate the potential and wake interactions on the flow evolution in the centrifugal compressor.

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Section: Instantaneous Velocity Fieldmentioning

confidence: 73%

Numerical study of wake and potential interactions in a two-stage centrifugal refrigeration compressor

Fan

Zhang

et al. 2021

Engineering Applications of Computational Fluid Mechanics

Self Cite

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“…Addressing these problems are current targets of research efforts to facilitate improved and increased application [9]. Numerous studies have been conducted to examine vibration patterns by experimental and numerical methods.…”

Section: Introductionmentioning

confidence: 99%

Vibration in a Multistage Centrifugal Pump under Varied Conditions

Liu

Zhou

Jiang

et al. 2019

Shock and Vibration

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Multistage pumps are intended to improve designs with low-vibration and -noise features as the industry applications increase the technical requirements. In this frame, it becomes really important to fully understand the vibration patterns of these kinds of complex machines. In this study, a vibration test bench was established to examine the vibration and stability of a cantilever multistage centrifugal pump under different flow rates. The vibration spectrum diagrams for the inlet and outlet sections and the pump body were evaluated under varied flow conditions. Results showed the effects of operational conditions on the vibration of the cantilever multistage centrifugal pump. Vibration velocity was primarily caused by mass unbalance at the shut-off flow rate point. Under different flow conditions, the blade passing frequency (BPF) and two times the blade passing frequency (2BPF) were the main excitation frequencies. The vibration frequency of the final pump body remained at the BPF under different flow conditions due to the contact with the outlet section. The major type of vibration frequency for the inlet and outlet was high frequency.

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“…To reveal and reduce the noise primarily generated by the freezer fan unit, Onur [14] investigated the vibration and acoustic interactions between the structure and the cavity inside the freezer cabinet, and the FEM method was also used. Zhou [15] performed a vibroacoustic analysis of a centrifugal compressor with connecting piping systems, in which the sound was induced by the unsteady flow in the centrifugal compressor and pipes, and the same FEM method was used. These studies have been of benefit in promoting the development of the research of vibrational sound radiation on structural casing, allowing for a deeper understanding of vibrational noise during the fan operation, and have provided a useful reference for the noise reduction of such machinery.…”

Section: Introductionmentioning

confidence: 99%

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

et al. 2019

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A numerical optimization is presented to reduce the vibrational noise of a centrifugal fan volute. Minimal vibrational radiated sound power was considered as the aim of the optimization. Three separate parts of volute panel thickness (ST: the side panel thickness; BT: the back panel thickness; FT: the front panel thickness) were taken as the design variables. Then, a vibrational noise optimization control method for the volute casing was proposed that considered the influence of vibroacoustic coupling. The optimization method was mainly divided into three main parts. The first was based on the simulation of unsteady flow to the fan to obtain the vibrational noise source. The second used the design of experiments (DoE) method and a weighted-average surrogate model (radial basis function, or RBF) with three design variables related to the geometries of the three-part volute panel thickness, which was used to provide the basic mathematical model for the optimization of the next part. The third part, implementing the low vibrational noise optimization for the fan volute, applied single-objective (taking volute radiated acoustical power as the objective function) and multi-objective (taking the volute radiated acoustical power and volute total mass as the objective function) methods. In addition, the fan aerodynamic performance, volute casing surface fluctuations, and vibration response were validated by experiments, showing good agreement. The optimization results showed that the vibrational noise optimization method proposed in this study can effectively reduce the vibration noise of the fan, obtaining a maximum value of noise reduction of 7.3 dB. The optimization in this study provides an important technical reference for the design of low vibroacoustic volute centrifugal compressors and fans whose fluids should be strictly kept in the system without any leakage.

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Numerical analysis of the vibration and noise induced by the unsteady flow in a centrifugal compressor

Cited by 12 publications

References 23 publications

Numerical study of wake and potential interactions in a two-stage centrifugal refrigeration compressor

Numerical study of wake and potential interactions in a two-stage centrifugal refrigeration compressor

Vibration in a Multistage Centrifugal Pump under Varied Conditions

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

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