Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor

Jia-Xuan Liu, Fu-Sheng Yang, Tian-Qing Huo, Jian-Qiang Deng and Zao-Xiao Zhang
Additional contact information
Jia-Xuan Liu: School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Fu-Sheng Yang: School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Tian-Qing Huo: School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Jian-Qiang Deng: School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Zao-Xiao Zhang: School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China

Energies, 2022, vol. 15, issue 14, 1-17

Abstract: To reduce the negative impacts of stall and surge on compressor performance, a novel combined casing treatment (CCT) structure with axial skewed slots and injection groove is proposed in this paper. The aerodynamic performance, as well as the mechanisms of loss generation, of a transonic axial compressor with NASA Rotor 67 are investigated numerically. The simulation results indicate that, compared with individual casing treatment method, the CCT works effectively with regard to operation performance. The stall margin (SM) is increased by 14.7% with 1.12% decrease in the peak efficiency. The interaction of axial skewed slots and injection groove can be explained by the enhancement of exchange flow in slots and axial motion of fluid. As a result, the leakage flow near the blade tip is eliminated and the flow separation is further suppressed. What is more, an analysis of entropy generation is also conducted. The results reveal that the effect of CCT on loss reduction mainly concentrates in the tip part of the blade, with the loss decrease about 14.46% compared with the original rotor. The best control effect can be expected by appropriate match between geometrical parameters of axial skewed slots and mass flow rate of injection from the parameter analysis.

Keywords: transonic compressor; axial skewed slot; end-wall injection; combined casing treatment; entropy generation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/14/5066/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/14/5066/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:14:p:5066-:d:860496

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().