Simulation research on aerodynamic noise characteristics of a compressor under different working conditions

Huabing Lu, Youhong Xiao, Yiteng Huang, Zhigang Liu, Ye Yuan , Peilin Zhou, Guanghui Yang

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Abstract

The shear stress transport turbulence model is employed to conduct a detailed study of flow characteristics at the highest efficiency point and near-stall point in a full-channel 1.5-stage compressor in this paper. The simulation results for the compressor's total pressure ratio and efficiency exhibit good agreement with experimental data. Emphasis is placed on examining the internal flow structure in the tip area of the compressor rotor under near-stall conditions. The results reveal that significant differences in flow structure primarily occur in the tip area as the compressor approaches stall. Specifically, a reduction in turbulent kinetic energy is observed in a region spanning approximately 20%–60% of the chord length on the rotor suction face near-stall conditions. Two additional peak frequencies, at 0.8 and 1.6 times the blade passage frequency, are observed, and the intricate flow phenomena are elaborated at the near-stall point. The near-stall point exhibits greater noise levels than the highest efficiency point, where the intensity of the surface source increases by more than 10 dB, peaking at 20 dB. This additional peak serves as a significant supplementary noise source near the stall point, leading to a maximum increase of 33.3 dB in the free radiated sound power. The acoustic response within the duct indicates that the compressor operating at the near-stall point continues to produce substantial noise on the actual test bench, showing an average increase of 6 dB in noise levels, and the distribution of the additional peak single-tone noise at the entrance significantly differs from that observed at the highest efficiency point.
Original languageEnglish
Pages (from-to)2517–2537
Number of pages21
JournalJournal of the Acoustical Society of America
Volume155
Issue number4
DOIs
Publication statusPublished - 9 Apr 2024

Keywords

  • compressor
  • aerodynamic noise
  • highest efficiency
  • near stall
  • flow characteristics

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