Identification of fan surge precursors based on acoustic array signals
-
摘要: 提出了一种基于麦克风声阵列信号的航空发动机风扇喘振先兆特征识别方法,有效避免了传统侵入式传感器在测量过程中对管道流场产生的外来干扰。开展多级风扇试验器由稳定旋转至喘振的瞬态测试试验,利用短时傅里叶分析、频谱分析和声模态分解的方法,对喘振先兆特征实现了辨识。结果表明:风扇在进入喘振前有非同步共振频率的强烈单音噪声,约为叶片通过频率的70%,是由多个模态波在转静叶排间共振产生。通过对特征频率和声模态谱的监测可以实现喘振的预警。Abstract: An approach for identification of the aero-engine surge precursors was proposed utilizing microphone array measurement, thereby the additional disturbance of classical intrusive measurement was avoided. A transient test on a multi-stage fan experiment was carried out from designed operating condition to surge margin, and the surge inception was realized by signal processing approaches including short-time Fourier transform, spectral analysis and acoustic mode analysis. The results demonstrated the occurrence of asynchronous frequency when the fan operated near the surge margin, and the frequency was about 70% of the blade passing frequency. The cause of such phenomenon was the resonance of azimuthal modes inside the rotor-stator row. The surge-warning was realized by characterizing the feature frequency and mode spectrum.
-
Key words:
- microphone array /
- acoustic mode /
- time-frequency analysis /
- surge-warning /
- mode resonance
-
[1] 王玉东.基于压气机出口静压变化率的喘振检测方法[J].航空动力学报,2020,35(6):1131-1139. WANG Yudong.Surge detection method based on rate of change of compressor discharge static pressure[J].Journal of Aerospace Power,2020,35(6):1131-1139.(in Chinese) [2] 李志平,张鹏,李秋实.低速轴流压气机旋转失速边界的模型描述[J].航空动力学报,2017,32(3):519-527. LI Zhiping,ZHANG Peng,LI Qiushi.Model description of rotating stall boundary in low-speed axial compressor[J].Journal of Aerospace Power,2017,32(3):519-527.(in Chinese) [3] GREITZER E M.Surge and rotating stall in axial flow compressors:Part Ⅰ theoretical compression system model[J].Journal of Engineering for Gas Turbines Power,1976,98(2):190-198. [4] LI C,XU S,HU Z.Experimental study of surge and rotating stall occurring in high-speed multistage axial compressor[J].Procedia Engineering,2015,99:1548-1560. [5] BRIGHT M M,QAMMAR H K,WEIGL H J,et al.Stall precursor identification in high-speed compressor stages using chaotic time series analysis methods[J].Journal of Turbomachinery,1997,119(3):491-499. [6] ZHENG X,SUN Z,KAWAKUBO T,et al.Experimental investigation of surge and stall in a turbocharger centrifugal compressor with a vaned diffuser[J].Experimental Thermal and Fluid Science,2017,82:493-506. [7] PULLAN G,YOUNG A M,DAY I J,et al.Origins and structure of spike-type rotating stall[J].Journal of Turbomachinery,2015,137(5):051007.1-051007.11. [8] MUNARI E,D’ELIA G,MORINI M,et al.Experimental investigation of vibrational and acoustic phenomena for detecting the stall and surge of a multistage compressor[J].Journal of Engineering for Gas Turbines and Power,2018,140(9):092605.1-092605.9. [9] SUN Z,ZOU W,ZHENG X.Instability detection of centrifugal compressors by means of acoustic measurements[J].Aerospace Science and Technology,2018,82:628-635. [10] CABRERA K,PEZZINI P,SHADLE L J,et al.Surge and stall detection using acoustic analysis for gas turbine hybrid cycles[J].Journal of Engineering for Gas Turbines and Power,2020,142(4):041026.1-041026.7. [11] TYLER J M,SOFRIN T G.Axial flow compressor noise studies[R].SAE Paper 620532,1962. [12] ZIADA S,OENGREN A,VOGEL A.Acoustic resonance in the inlet scroll of a turbo-compressor[J].Journal of Fluids and structures,2002,16(3):361-373. [13] KIELB R E,BARTER J W,THOMAS J P,et al.Blade excitation by aerodynamic instabilities:a compressor blade study[R].ASME Paper GT 2003-38634,2003. [14] VIGNAU T F,GIRARDEAU D.Aerodynamic rotating vortex instability in a multi-stage axial compressor[R].AIAA-2005-1137,2005. [15] LEVY Y,PISMENNY J.High-frequency pressure oscillations of rotating stall type:Part 1 time and frequency characteristics[J].International Journal of Turbo and Jet Engines,2005,22(2):59-78. [16] HELLMICH B,SEUME J R.Causes of acoustic resonance in a high-speed axial compressor[J].Journal of turbomachinery,2008,130(3):031003.1-031003.9. [17] HAYNES J M,HENDRICKS G J,EPSTEIN A H.Active stabilization of rotating stall in a three-stage axial compressor[J].Journal of Turbomachinery,1994,116(2):226-239. [18] PADUANO J D,GREITZER E M,EPSTEIN A H.Compression system stability and active control[J].Annual Review of Fluid Mechanics,2001,33(1):491-517.
点击查看大图
计量
- 文章访问数: 240
- HTML浏览量: 1
- PDF量: 770
- 被引次数: 0