Numerical Investigation of Internal Fluid-induced Volute Vibration in a Marine Centrifugal FanChinese Full TextEnglish Full Text (MT)
Zhang Jianhua;Chu Wuli;Dong Xingjie;Zhang Haoguang;School of Power and Energy,Northwestern Polytechnical University;Collaborative Innovation Center of Advanced Aero-Engine;
Abstract: A numerical method for casing structural vibration in a marine centrifugal fan was presented. Firstly,an unsteady flow field calculation of centrifugal fan was employed to obtain the vibration sources of volute casing; then a weak fluid-structure coupling algorithm was used for grid interpolation and loading aerodynamics loads; at the last,the volute structure vibration response was obtained based on the mode superposition method of FEM.Numerical results of pressure fluctuations in the flow fields and vibration responses are compared with experiments respectively,showing a good agreement. The mechanism of fluid-induced structural vibration was discussed through pressure fluctuations in the fluid fields and structural vibration responses,the pressure fluctuations of BPF are the primary exciting source of fluid-structure vibrations, BPF component is predominant in vibration frequency response. The major structural vibration response of volute casing results from contributions of both unsteady aerodynamics and vibration modal in BPF.
- DOI:
10.13433/j.cnki.1003-8728.2016.0405
- Series:
- Subject:
- Classification Code:
U674.703
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