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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 11    November 2018

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Noise comparison of centrifugal pump operating in pump and turbine mode
DONG Liang(董亮)1, DAI Cui(代翠)2, 3, LIN Hai-bo(林海波)3, CHEN Yi-ping(陈怡平)2

1. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University,Zhenjiang 212013, China;
2. School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China;
3. Sichuan Provincial Key Lab of Process Equipment and Control, Sichuan University of Science & Engineering, Zigong 64300, China

Abstract:Investigations regarding the relation of noise performance for centrifugal pump operating in pump and turbine modes continue to be inadequate. This paper presents a series of comparisons of flow-induced noise for both operation modes. The interior flow-borne noise and structure modal were verified through experiments. The flow-borne noise was calculated by the acoustic boundary element method (ABEM), and the flow-induced structure noise was obtained by the coupled acoustic boundary element method (ABEM)/structure finite element method (SFEM). The results show that in pump mode, the pressure fluctuation in the volute is comparable to that in the outlet pipe, but in turbine mode, the pressure fluctuation in the impeller is comparable to that in the draft tube. The main frequency of interior flow-borne noise lies at blade passing frequency (BPF) and it shifts to the 9th BPF for interior flow-induced structure noise. The peak values at horizontal plane appear at the 5th BPF, and at axial plane, they get the highest sound pressure level (SPL) at the 8th BPF. Comparing with interior noise, the SPL of exterior flow-induced structure noise is incredibly small. At the 5th BPF, the pump body, cover and suspension show higher SPL in both modes. The outer walls of turbine generate relatively larger SPL than those of the pump.

 

Key words: centrifugal pump as turbine; noise performance; acoustic boundary element method; acoustic finite element method

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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