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Investigation on Flow-Induced Noise due to Backflow in Low Specific Speed Centrifugal Pumps
Joint Authors
Liang, Yun
Yuan, Jianping
Yuan, Shouqi
Si, Qiaorui
Source
Advances in Mechanical Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-09-24
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Flow-induced noise causes disturbances during the operation of centrifugal pumps and also affects their performance.
The pumps often work at off-design conditions, mainly at part-load conditions, because of frequent changes in the pump device system.
Consequently numerous unstable phenomena occur.
In low specific speed centrifugal pumps the main disturbance is the inlet backflow, which is considered as one of the most important factors of flow-induced noise and vibration.
In this study, a test rig of the flow-induced noise and vibration of the centrifugal pump was built to collect signals under various operating conditions.
The three-dimensional unsteady flow of centrifugal pumps was calculated based on the Reynolds-averaged equations that resemble the shear stress transport (SST) k-ω turbulence model.
The results show that the blade passing frequency and shaft frequency are dominant in the spectrum of flow-induced noise, whereas the shaft component, amplitude value at shaft frequency, and peak frequencies around the shaft increase with decreasing flow.
Through flow field analysis, the inlet backflow of the impeller occurs under 0.7 times the design flow.
The pressure pulsation spectrum with backflow conditions validates the flow-induced noise findings.
The velocity characteristics of the backflow zone at the inlet pipe were analyzed, and the dynamic characteristics of the backflow eddy during one impeller rotating period were simultaneously obtained by employing the backflow conditions.
A flow visualization experiment was performed to confirm the numerical calculations.
American Psychological Association (APA)
Si, Qiaorui& Yuan, Shouqi& Yuan, Jianping& Liang, Yun. 2013. Investigation on Flow-Induced Noise due to Backflow in Low Specific Speed Centrifugal Pumps. Advances in Mechanical Engineering،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-447119
Modern Language Association (MLA)
Si, Qiaorui…[et al.]. Investigation on Flow-Induced Noise due to Backflow in Low Specific Speed Centrifugal Pumps. Advances in Mechanical Engineering No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-447119
American Medical Association (AMA)
Si, Qiaorui& Yuan, Shouqi& Yuan, Jianping& Liang, Yun. Investigation on Flow-Induced Noise due to Backflow in Low Specific Speed Centrifugal Pumps. Advances in Mechanical Engineering. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-447119
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-447119