Design, modification and optimization of an ultra-high-load transonic low-reaction aspirated compressor

Shijun Sun*, Songtao Wang, Shaowen Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Low-reaction (LR) aspirated compressor is a promising design methodology to enhance the work capacity substantially. However, for the high-load transonic compressor, to achieve LR design, the effect of different combinations of inlet pre-swirl and meridian contraction on performance has not been investigated. In addition, the quantitative advantage of LR design over convention-reaction (CR) design is also not available. This paper presents a series of aerodynamic designs of the high-load transonic compressor stage, including a CR stage and three LR stages with a comprehensive application of the LR design method and the aspiration technology. 3D calculation reveals that under the same tip speed and rotational speed and a total bleed flow fraction of 2.84% of the stage inlet mass flow, the preliminary LR design achieves a total pressure ratio of 2.34 and a throughflow adiabatic efficiency of 88.11%, which is respectively 30% and 0.19% higher over CR design. The corresponding loading coefficient rises from 0.45 to 0.66. Through the modified design of introducing non-uniform counter-swirl along the span and increasing the meridian contraction, the loading coefficient is further increased to 0.69. Due to the insufficient stall margin induced by ultra-high-load LR design, a further casing contraction of the optimized design relative to the modified one is conducted to decrease the loading and thus the stall margin is increased by 1%.

Original languageEnglish
Article number105975
JournalAerospace Science and Technology
Volume105
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Adiabatic efficiency
  • Aerodynamic design
  • Loading coefficient
  • Low reaction
  • Stall margin
  • Transonic ultra-high-load compressor

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Sun, S., Wang, S., & Chen, S. (2020). Design, modification and optimization of an ultra-high-load transonic low-reaction aspirated compressor. Aerospace Science and Technology, 105, Article 105975. https://doi.org/10.1016/j.ast.2020.105975