Abstract
The three dimensional, compressible, unsteady Navier-Stokes equations are solved to investigate the flow field of a centrifugal compressor with high compression ratio. Computational domain is consisted of an inlet bell and impeller with splitter blades followed by a two dimensional wedge vaned diffuser. The numerical method is validated by comparing the computational results with the experiments in terms of pressure ratio and compressor efficiency. The present study focuses on the unsteady pressure fluctuations and entropy production within the impeller and diffuser passages at the compressor design point. It is shown that the interaction between the impeller and diffuser blades leads to unsteadiness at the interface region and a pulsating behavior within the diffuser passages. Pressure waves with different convective velocities, generated by the impellerdiffuser interaction and pseudo-periodic unsteady separation bubbles, are captured in time/space domain along the diffuser blade surfaces. The pressure fluctuation spectra captured at the impeller-diffuser interface is evaluated to analyze the noise characteristics of the centrifugal compressor as a main source of blade passing frequency noise.
| Original language | English |
|---|---|
| Title of host publication | Turbomachinery |
| Publisher | American Society of Mechanical Engineers (ASME) |
| Volume | 2D-2016 |
| ISBN (Electronic) | 9780791849729 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 - Seoul, Korea, Republic of Duration: 2016 Jun 13 → 2016 Jun 17 |
Other
| Other | ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 |
|---|---|
| Country | Korea, Republic of |
| City | Seoul |
| Period | 16/6/13 → 16/6/17 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Numerical evaluation of the unsteady flow in a centrifugal compressor with Vaned diffuser via Urans approach. / Zamiri, Ali; Lee, Byung Ju; Chung, Jin Taek.
Turbomachinery. Vol. 2D-2016 American Society of Mechanical Engineers (ASME), 2016.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Numerical evaluation of the unsteady flow in a centrifugal compressor with Vaned diffuser via Urans approach
AU - Zamiri, Ali
AU - Lee, Byung Ju
AU - Chung, Jin Taek
PY - 2016
Y1 - 2016
N2 - The three dimensional, compressible, unsteady Navier-Stokes equations are solved to investigate the flow field of a centrifugal compressor with high compression ratio. Computational domain is consisted of an inlet bell and impeller with splitter blades followed by a two dimensional wedge vaned diffuser. The numerical method is validated by comparing the computational results with the experiments in terms of pressure ratio and compressor efficiency. The present study focuses on the unsteady pressure fluctuations and entropy production within the impeller and diffuser passages at the compressor design point. It is shown that the interaction between the impeller and diffuser blades leads to unsteadiness at the interface region and a pulsating behavior within the diffuser passages. Pressure waves with different convective velocities, generated by the impellerdiffuser interaction and pseudo-periodic unsteady separation bubbles, are captured in time/space domain along the diffuser blade surfaces. The pressure fluctuation spectra captured at the impeller-diffuser interface is evaluated to analyze the noise characteristics of the centrifugal compressor as a main source of blade passing frequency noise.
AB - The three dimensional, compressible, unsteady Navier-Stokes equations are solved to investigate the flow field of a centrifugal compressor with high compression ratio. Computational domain is consisted of an inlet bell and impeller with splitter blades followed by a two dimensional wedge vaned diffuser. The numerical method is validated by comparing the computational results with the experiments in terms of pressure ratio and compressor efficiency. The present study focuses on the unsteady pressure fluctuations and entropy production within the impeller and diffuser passages at the compressor design point. It is shown that the interaction between the impeller and diffuser blades leads to unsteadiness at the interface region and a pulsating behavior within the diffuser passages. Pressure waves with different convective velocities, generated by the impellerdiffuser interaction and pseudo-periodic unsteady separation bubbles, are captured in time/space domain along the diffuser blade surfaces. The pressure fluctuation spectra captured at the impeller-diffuser interface is evaluated to analyze the noise characteristics of the centrifugal compressor as a main source of blade passing frequency noise.
UR - http://www.scopus.com/inward/record.url?scp=84991730796&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84991730796&partnerID=8YFLogxK
U2 - 10.1115/GT2016-57538
DO - 10.1115/GT2016-57538
M3 - Conference contribution
AN - SCOPUS:84991730796
VL - 2D-2016
BT - Turbomachinery
PB - American Society of Mechanical Engineers (ASME)
ER -