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Vorticity dynamics diagnosis of the internal flow field in a high-load counter-rotating compressor

Published online by Cambridge University Press:  17 May 2023

T. Yan ,
H. Chen  and
P. Yan Open the ORCID record for P. Yan [Opens in a new window]
T. Yan
Affiliation:
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
H. Chen
Affiliation:
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
P. Yan*
Affiliation:
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
*
Corresponding author: P. Yan; Email: peigang_y@163.com
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Abstract

A high-load counter-rotating compressor is optimised based on the method of coupling aerodynamic optimisation technology and computational fluid dynamics, and the flow structures in the passage are analysed and evaluated by vorticity dynamics diagnosis. The results show that the aerodynamic performance of optimised compressor are obviously improved at both design point and off-design point. By comparing the distribution characteristics of vorticity dynamics parameters on the blade surface before and after the optimisation, it is found that BVF (boundary vorticity flux) and circumferential vorticity can effectively capture high flow loss regions such as shock waves and secondary flow in the passage. In addition, the BEF (Boundary enstrophy flux) diagnosis method based on the theory of boundary enstrophy flux is developed, which expands the application scenario of the boundary vorticity dynamics diagnosis method. The change of vorticity dynamics parameters shows blade geometric parameters’ influence on the passage’s viscous flow field, which provides a theoretical basis for the aerodynamic optimisation design.

Keywords

counter-rotating compressornumerical simulationvorticity dynamics diagnosisboundary enstrophy fluxaerodynamic optimisation design
Type
Research Article
Information
The Aeronautical Journal , Volume 128 , Issue 1319 , January 2024 , pp. 191 - 210
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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