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Experimental and Numerical Analysis of the Impeller Backside Cavity in a Centrifugal Compressor for CAES
| Content Provider | MDPI |
|---|---|
| Author | Lin, Zhihua Zuo, Zhitao Li, Wei Sun, Jianting Zhou, Xin Chen, Haisheng Zhou, Xuezhi |
| Copyright Year | 2022 |
| Description | 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. |
| Starting Page | 420 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en15020420 |
| Journal | Energies |
| Issue Number | 2 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-01-06 |
| Access Restriction | Open |
| Subject Keyword | Energies Aerospace Engineering Centrifugal Compressor Impeller Backside Cavity Variable Rotating Speeds Coupling Characteristics |
| Content Type | Text |
| Resource Type | Article |
