Flow behavior in a contra-rotating transonic axial compressor

Authors

  • S. Abbasi Faculty of Mechanical, Arak University of Technology, Arak, 3818141167, Iran. Phone: +988633400663
  • M. Alizadeh Faculty of Mechanical Engineering, Arak University of Technology, Arak, 3818141167, Iran

DOI:

https://doi.org/10.15282/jmes.15.3.2021.20.0664

Keywords:

Axial compressor, contra-rotating, numerical simulation, performance curve

Abstract

This study investigated a three-dimensional flow analysis on a two-stage contra-rotating axial compressor using the Navier–Stokes, continuity, and energy equations with Ansys CFX commercial software. In order to validate the obtained results, the absolute and relative flow angles curves for each rotor in radial direction were extracted and compared with the other investigation results, indicating good agreement. The compressor efficiency curve also was extracted by varying the compressor pressure ratio and compressor efficiency against mass flow rate. The flow results revealed that further distortion of the flow structure in the second rotor imposed a greater increase in the amount of entropy, especially at near-stall conditions. The increase of entropy in the second rotor is due to the interference of the tip leakage flow with the main flow which consequently caused more drops in the second rotor, suggesting that more efficacy of flow control methods occurred in the second rotor than in the first rotor.

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Published

2021-09-19 — Updated on 2021-09-19

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How to Cite

Abbasi, S., & alizadeh, maryam. (2021). Flow behavior in a contra-rotating transonic axial compressor. Journal of Mechanical Engineering and Sciences, 15(3), 8440–8449. https://doi.org/10.15282/jmes.15.3.2021.20.0664