LAPSE:2023.16112
Published Article
LAPSE:2023.16112
Experimental and Numerical Analysis of the Impeller Backside Cavity in a Centrifugal Compressor for CAES
March 3, 2023
Abstract
Relying on a closed test rig of a high-power intercooling centrifugal compressor for compressed air energy storage (CAES), this study measured the static pressure and static temperature at different radii on the static wall of the impeller backside cavity (IBC) under variable rotating speeds. Simultaneously, the coupled computations of all mainstream domains with IBC or not were used for comparative analysis of the aerodynamic performances of the compressor and the internal flow field in IBC. The results show that IBC has a significant impact on coupling characteristics including pressure ratio, efficiency, torque, shaft power, and axial thrust of the centrifugal compressor. The gradients of radial static pressure and static temperature in IBC both increase with the decrease of mainstream flow or the increase of rotating speed, whose distributions are different under variable rotating speeds due to the change of the aerodynamic parameters of mainstream.
Relying on a closed test rig of a high-power intercooling centrifugal compressor for compressed air energy storage (CAES), this study measured the static pressure and static temperature at different radii on the static wall of the impeller backside cavity (IBC) under variable rotating speeds. Simultaneously, the coupled computations of all mainstream domains with IBC or not were used for comparative analysis of the aerodynamic performances of the compressor and the internal flow field in IBC. The results show that IBC has a significant impact on coupling characteristics including pressure ratio, efficiency, torque, shaft power, and axial thrust of the centrifugal compressor. The gradients of radial static pressure and static temperature in IBC both increase with the decrease of mainstream flow or the increase of rotating speed, whose distributions are different under variable rotating speeds due to the change of the aerodynamic parameters of mainstream.
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Keywords
centrifugal compressor, coupling characteristics, impeller backside cavity, variable rotating speeds
Suggested Citation
Lin Z, Zuo Z, Li W, Sun J, Zhou X, Chen H, Zhou X. Experimental and Numerical Analysis of the Impeller Backside Cavity in a Centrifugal Compressor for CAES. (2023). LAPSE:2023.16112
Author Affiliations
Lin Z: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China [ORCID]
Zuo Z: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Energy Large Scale Physical Energy Storage Technologies R&D Center of Bijie High-Tech In
Li W: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
Sun J: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China [ORCID]
Zhou X: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
Chen H: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Energy Large Scale Physical Energy Storage Technologies R&D Center of Bijie High-Tech In [ORCID]
Zhou X: National Energy Large Scale Physical Energy Storage Technologies R&D Center of Bijie High-Tech Industrial Development Zone, Bijie 551712, China
Zuo Z: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Energy Large Scale Physical Energy Storage Technologies R&D Center of Bijie High-Tech In
Li W: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
Sun J: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China [ORCID]
Zhou X: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
Chen H: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Energy Large Scale Physical Energy Storage Technologies R&D Center of Bijie High-Tech In [ORCID]
Zhou X: National Energy Large Scale Physical Energy Storage Technologies R&D Center of Bijie High-Tech Industrial Development Zone, Bijie 551712, China
Journal Name
Energies
Volume
15
Issue
2
First Page
420
Year
2022
Publication Date
2022-01-06
ISSN
1996-1073
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PII: en15020420, Publication Type: Journal Article
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LAPSE:2023.16112
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https://doi.org/10.3390/en15020420
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