Aero-acoustic performance of a continuous transonic wind-tunnel axial-flow compressor
- Resource Type
- article
- Authors
- LONG Bingxiang; CHEN Jiming; CHEN Zhenhua; LIU Zongzheng; LIAO Daxiong
- Source
- Xibei Gongye Daxue Xuebao, Vol 40, Iss 4, Pp 829-836 (2022)
- Subject
- 连续式跨声速风洞
轴流压缩机
气动噪声
Motor vehicles. Aeronautics. Astronautics
TL1-4050
- Language
- Chinese
- ISSN
- 1000-2758
2609-7125
A three-stage axial-flow compressor was developed for a continuous transonic wind tunnel. The rotor-stator spacing and the ratio of number of rotor blades to number of stator vanes were properly chosen for the purpose of aero-acoustic noise suppression. The aero-acoustic performances of the axial-flow compressor were tested and analyzed. The test results show that the first BPF tonal noise is effectively suppressed even though some of it still exists; the noise amplitude frequency spectrum shows that the abnormal tonal noise, which is different from that related to BPF and its harmonics, exists under a wide range of working conditions and plays a dominant role in determining the sound pressure levels of the inlet and outlet of the axial-flow compressor. The comparison of test results shows that vibration is induced by the periodic non-uniform inlet flow condition and that the rotor blade that has a high aspect ratio is one of the main noise sources responsible for the abnormal tonal noise.