缝式机匣处理对跨声速轴流压气机叶尖流场结构的非定常影响

Zhidong Chi, Wuli Chu, Yaofeng Zhang, Jibo Yang, Haoguang Zhang

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

Aiming to reveal the influencing mechanism of casing treatment on rotor tip flow structures, unsteady numerical method was used to study the effects of slot-type casing treatment in a transonic compressor. The results showed that obvious change of frequency-domain characteristics appeared in the tip flow fields under the effect of casing treatment. At smooth casing, the breakdown of tip leakage vortex and vortex shedding contributed to the unsteadiness of tip flow fields. With casing treatment, the tip leakage flow got motivated and the detached shock moved downstream, which restrained the tip leakage vortex breakdown and induced blockage together. As a result, the excitation frequency of casing treatment played a leading role. Besides, the analysis of vortex structures showed that the interaction of tip leakage vortex and corner vortex significantly varied in different mass flow conditions. At large mass flow rates, the tip leakage vortex and corner vortex induced by casing treatment occurred almost at the same time, resulting in a weak vortex interaction and independent vortex structure. At low mass flow rates, however, the interaction of corner vortex and tip leakage vortex was strengthened. So there existed a strong transition of vortex structure in tip flow fields.

投稿的翻译标题Unsteady Effect of Slot-Type Casing Treatment on the Rotor Tip Flow Structures in a Transonic Axial Flow Compressor
源语言繁体中文
页(从-至)25-33
页数9
期刊Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University
55
11
DOI
出版状态已出版 - 10 11月 2021

关键词

  • Casing treatment
  • Corner vortex
  • Tip leakage vortex
  • Transonic axial compressor
  • Unsteady flow

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