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Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition
Joint Authors
Li, Yi-bin
He, Chang-hong
Li, Jian-zhong
Source
Mathematical Problems in Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-04-16
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
To investigate the unsteady flow characteristics and their influence mechanism in the volute of centrifugal pump, the Reynolds time-averaged N-S equation, RNG k-ε turbulence model, and structured grid technique are used to numerically analyze the transient flow-field characteristics inside the centrifugal pump volute.
Based on the quantified parameters of flow field in the volute of centrifugal pump, the velocity mode contours and oscillation characteristics of the mid-span section of the volute of centrifugal pump are obtained by dynamic mode decomposition (DMD) for the nominal and low flow-rate condition.
The research shows that the first-order average flow mode extracted by DMD is the dominant flow structure in the flow field of the volute.
The second-order and third-order modes are the most important oscillation modes causing unsteady flow in the volute, and the characteristic frequency of the two modes is consistent with the blade passing frequency and the 2x blade passing frequency obtained by the fast Fourier transform (FFT).
By reconstructing the internal flow field of the volute with the blade passing frequency for the nominal flow-rate condition, the periodic variation of the unsteady flow structure in the volute under this frequency is visually reproduced, which provides some ideas for the study of the unsteady structure in the internal flow field of centrifugal pumps.
American Psychological Association (APA)
Li, Yi-bin& He, Chang-hong& Li, Jian-zhong. 2019. Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition. Mathematical Problems in Engineering،Vol. 2019, no. 2019, pp.1-15.
https://search.emarefa.net/detail/BIM-1194824
Modern Language Association (MLA)
Li, Yi-bin…[et al.]. Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition. Mathematical Problems in Engineering No. 2019 (2019), pp.1-15.
https://search.emarefa.net/detail/BIM-1194824
American Medical Association (AMA)
Li, Yi-bin& He, Chang-hong& Li, Jian-zhong. Study on Flow Characteristics in Volute of Centrifugal Pump Based on Dynamic Mode Decomposition. Mathematical Problems in Engineering. 2019. Vol. 2019, no. 2019, pp.1-15.
https://search.emarefa.net/detail/BIM-1194824
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194824