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Comparative Study on Steady and Unsteady Flow in a Centrifugal Compressor Stage
Joint Authors
Source
International Journal of Aerospace Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-06-09
Country of Publication
Egypt
No. of Pages
12
Abstract EN
Steady Reynolds-averaged Navier-Stokes (RANS) simulation with the mixing-plane approach is the most common procedure to obtain the performance of a centrifugal compressor in an industrial development process.
However, the accurate prediction of complicated flow fields in centrifugal compressors is the most significant challenge.
Some phenomena such as the impeller-diffuser flow interaction generates the unsteadiness which can affect the steady assumption.
The goal of this study is to investigate the differences between the RANS and URANS simulation results in a centrifugal compressor stage.
Simulations are performed at three operating points: near surge (NS), design point (DP), and near choke (NC).
The results show that the RANS simulation can predict the overall performance with reasonable accuracy.
However, the differences between the RANS and URANS simulation are quite significant especially in the region that the flows are highly unsteady or nearly separated.
The RANS simulation is still not very accurate to predict the time-dependent quantities of the flow structure.
It shows that the URANS calculations are necessary to predict the detailed flow structures and performance.
The phenomena and mechanisms of the complex and highly unsteady flow in the centrifugal compressor with a vaned diffuser are presented and analyzed in detail.
American Psychological Association (APA)
Kim, Changhee& Son, Changmin. 2019. Comparative Study on Steady and Unsteady Flow in a Centrifugal Compressor Stage. International Journal of Aerospace Engineering،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1157143
Modern Language Association (MLA)
Kim, Changhee& Son, Changmin. Comparative Study on Steady and Unsteady Flow in a Centrifugal Compressor Stage. International Journal of Aerospace Engineering No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1157143
American Medical Association (AMA)
Kim, Changhee& Son, Changmin. Comparative Study on Steady and Unsteady Flow in a Centrifugal Compressor Stage. International Journal of Aerospace Engineering. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1157143
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157143