Rotating instability (RI) characteristics of a single stage low speed compressor are analyzed by full channel numerical calculation method. Variations and the reasons of frequency characteristics, modes characteristics and flow characteristics of RI under four different tip clearances are investigated. The coherence analysis method is used to obtain the coherent function and the mutual power spectrum of the pressure signal at the same angle in the adjacent blade channel, which show the propagation characteristics of the channel vortex structure with flow in the circumferential direction. The circumferential modal characteristics of RI, the pulsating and rotating characteristics of channel vortex structures affecting RI as well as its relationship in absolute and relative coordinate systems are obtained by spatial mode decomposition and rotation source mechanism analysis. Results show that with the decrease of tip clearance, the flow intensity of tip clearance decreases, the intensity of RI gradually decreases, and the order of main modes increases.
LAI Shengzhi,WU Yadong,TIAN Jie,OUYANG Hua
. Rotating Instability Characteristics in Compressor with
Different Tip Clearances[J]. Journal of Shanghai Jiaotong University, 2020
, 54(3)
: 265
-276
.
DOI: 10.16183/j.cnki.jsjtu.2020.03.006
[1]BAUMGARTNER M, KAMEIER F, HOURMOUZIADIS J. Non-engine order blade vibration in a high pressure compressor[C]//12th International Symposium on Air Breathing Engines (ISABE 1995). Melbourne, Australia: ISABE, 1995: 1019-1030.
[2]KIELB R E, BARTER J W, THOMAS J P, et al. Blade excitation by aerodynamic instabilities: A compressor blade study[C]//ASME Turbo Expo 2003, Collocated with the 2003 International Joint Power Generation Conference. Atlanta, Georgia, USA: ASME, 2003: 399-406.
[3]IM H S, ZHA G C. Effects of rotor tip clearance on tip clearance flow potentially leading to NSV in an axial compressor[C]//ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. Copenhagen, Denmark: ASME, 2012: 1383-1394.
[4]SANDERS A J. Non-synchronous vibration (NSV) due to a flow-induced aerodynamic instability in a composite fan stator[C]//ASME Turbo Expo 2004: Power for Land, Sea, and Air. Vienna, Austria: ASME, 2004: 507-516.
[5]NEUHAUS L, SCHULZ J, NEISE W, et al. Active control of the aerodynamic performance and tonal noise of axial turbomachines[J]. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2003, 217(4): 375-383.
[6]KAMEIER F, NEISE W. Experimental study of tip clearance losses and noise in axial turbomachines and their reduction[J]. Journal of Turbomachinery, 1997, 119(3): 460-471.
[7]KAMEIER F, NEISE W. Rotating blade flow instability as a source of noise in axial turbomachines[J]. Journal of Sound and Vibration, 1997, 203(5): 833-853.
[8]MAILACH R, LEHMANN I, VOGELER K. Rotating instabilities in an axial compressor originating from the fluctuating blade tip vortex[J]. Journal of Turbomachinery, 2001, 123(3): 453-460.
[9]MARZ J, HAH C, NEISE W. An experimental and numerical investigation into the mechanisms of rotating instability[J]. Journal of Turbomachinery, 2002, 124(3): 367-374.
[10]PARDOWITZ B, TAPKEN U, SORGE R, et al. Rotating instability in an annular cascade: Detailed analysis of the instationary flow phenomena[J]. Journal of Turbomachinery, 2014, 136(6): 061017.
[11]PARDOWITZ B, TAPKEN U, NEUHAUS L, et al. Experiments on an axial fan stage: Time-resolved analysis of rotating instability modes[J]. Journal of Engineering for Gas Turbines and Power, 2015, 137(6): 062505.
[12]PARDOWITZ B, MOREAU A, TAPKEN U, et al. Experimental identification of rotating instability of an axial fan with shrouded rotor[J]. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2015, 229(5): 520-528.
[13]陈智洋, 吴艳辉, 安光耀, 等. 轴流压气机转子旋转不稳定性检测及机理探讨[J]. 推进技术, 2017, 38(11): 2401-2410.
CHEN Zhiyang, WU Yanhui, AN Guangyao, et al. Experimental detection of rotating instability and exploration of its flow mechanism in an axial flow compressor rotor[J]. Journal of Propulsion Technology, 2017, 38(11): 2401-2410.
[14]王昊, 吴亚东, 欧阳华. 低速轴流压气机中气动旋转不稳定性和叶顶泄漏流脉动特性[J]. 航空动力学报, 2016, 31(9): 2239-2250.
WANG Hao, WU Yadong, OUYANG Hua. Aerodynamic rotating instability and fluctuated characte-ristics of tip clearance flow in low speed axial flow compressor[J]. Journal of Aerospace Power, 2016, 31(9): 2239-2250.
[15]王昊, 吴亚东, 欧阳华. 压气机叶顶泄漏流振荡周向传播特性的数值模拟[J]. 航空动力学报, 2017, 32(3): 538-548.
WANG Hao, WU Yadong, OUYANG Hua. Nume-rical simulations on circumferential propagation cha-racteristics of tip leakage flow oscillation in compre-ssor[J]. Journal of Aerospace Power, 2017, 32(3): 538-548.
[16]WANG H, WU Y D, OUYANG H, et al. Casing pressure measurements and numerical simulations of a 1.5 stage axial compressor: Tip leakage flow and rotating instability[C]//ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. Düsseldorf, Germany: ASME, 2014: GT2014-25086.