Mechanical Sciences
Mechanical Sciences
Mechanical Sciences
Articles | Volume 16, issue 2
Articles | Volume 16, issue 2
https://doi.org/10.5194/ms-16-549-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ms-16-549-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 2
Research article
 | 
20 Oct 2025
Research article |  | 20 Oct 2025

Effect of the gap between the diffuser blade and impeller blade on the internal complex flow and aerodynamic performance of a centrifugal compressor

Jinxi Chen, Yuqian Zhang, Zhengdao Wang, Hui Yang, Wei Zhang, Zuchao Zhu, and Yikun Wei

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Short summary
This study examines how adjusting the gap ratio (Rd) between diffuser and impeller blades in centrifugal compressors affects performance. Computer simulations reveal that increasing Rd improves airflow stability at critical stages, reducing energy losses caused by turbulent airflow. Higher Rd also lowers the minimum airflow requirement and enhances pressure recovery, leading to better efficiency. 
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