低速轴流压气机旋转不稳定性数值研究
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摘要
本文利用数值模拟方法研究低速轴流压气机中的旋转不稳定性现象。通过对压气机转子进行全通道非定常数值模拟,成功的在转子叶顶区域的压力脉动频谱中捕捉到了旋转不稳定性特征频率。数值模拟得到的旋转不稳定性频率特征与实验测量结果一致,都表现为宽频频率带凸起,且具有多重频率峰值的特性。在相对坐标系下,旋转不稳定性频率表现为主频率及其谐波处的宽频特征。在绝对坐标系下,压力脉动频谱中除了叶片通过频率BPF,出现了多个由旋转不稳定性导致的宽频带,这些宽频带的出现是由旋转不稳定性扰动源与转子叶片干涉导致的,可以由动-动干涉模型解释。
The phenomenon of rotating instability in a low speed axial compressor was investigated using numerical simulations. Through the full-annulus unsteady simulations on the flow field of the compressor rotor, the characteristic frequency of rotating instability was captured in the pressure spectrum of the monitor points near rotor tip. The frequency feature of rotating instability captured by numerical simulations was in accordance with the measured results, both of which manifested as the broadband frequency humps with multiple peaks. In the relative coordinate frame, the rotating instability frequency showed broadband features at base frequency and its harmonics. In the absolute coordinate frame, besides the blade passing frequency(BPF), multiple broadband humps were induced by rotating instability in the pressure spectrum. These broadband humps in the absolute frame were caused by the interaction of rotating instability disturbance and the rotor rotation, which can be explained by the rotor-rotor interaction model.
The phenomenon of rotating instability in a low speed axial compressor was investigated using numerical simulations. Through the full-annulus unsteady simulations on the flow field of the compressor rotor, the characteristic frequency of rotating instability was captured in the pressure spectrum of the monitor points near rotor tip. The frequency feature of rotating instability captured by numerical simulations was in accordance with the measured results, both of which manifested as the broadband frequency humps with multiple peaks. In the relative coordinate frame, the rotating instability frequency showed broadband features at base frequency and its harmonics. In the absolute coordinate frame, besides the blade passing frequency(BPF), multiple broadband humps were induced by rotating instability in the pressure spectrum. These broadband humps in the absolute frame were caused by the interaction of rotating instability disturbance and the rotor rotation, which can be explained by the rotor-rotor interaction model.
引文
[1] Neuhaus L, Neise W. Active Flow Control to Improve the Aerodynamic and Acoustic Performance of Axial Turbomachines[R]. ALAA Paper No 2002-2948. 2002
[2] Baumgartner M,Kameier F, Hourmouziadis J. NonEngine Order Blade Vibration in a High Pressure Compressor[C]//12th International Symposium on Airbreathing Engines, Melbourne, Australia:ISABE, 1995:10-15
[3] 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
[4] 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
[5] M?rzJ, Hah. C, Neise W. An Experimental and Numerical Investigation into the Mechanisms of Rotating Instability[J]. Journal of Turbomachinery, 2002, 124(3):367-374
[6] Hah C, Bergner J, Schiffer H P. Tip Clearance VortexOscillation, Vortex Shedding and Rotating Instabilities in an Axial Transonic Compressor Rotor[R]. ASME Paper GT2008-50105, 2008
[7] Hah C, Voges M, Mueller M. Characteristics of Tip Clearance Flow Instability in a Transonic Compressor[R].ASME Paper GT2010-22101, 2010
[8] Pardo witz B, Tap ken U, Enghardt L. Time-Resolved Rotating Instability Waves in an Annular Cascade[C]//18th AIAA/CEAS Aeroacoustics Conference, Colorado Springs, CO, 2012:4-6
[9]吴艳辉,吴俊峰,稂仿玉,等.轴流压气机转子近叶尖流动的试验和数值研究之二:近失速工况流动特征分析[J].工程热物理学报,2014, 35(1):60-65WU Yanhui, Wu Junfeng, LANG Fangyu, et al. Experimental and Numerical Investigation of Near-Tip FlowField in an Axial Flow Compressor Rotor-Part II:Flow Characteristics at Near-Stall Operating Conditions[J].Journal of Engineering Thermophysics, 2014, 35(1):60-65
[10]付磊,袁巍,宋西镇,等.跨声速压气机转子叶尖流场旋转不稳定现象的数值研究[J].航空动力学报,2014, 29(5):1145-1153FU Lei, Yuan Wei, SONG Zhenxi, et al. Numerical Investigations on Rotating Instability Phenomenon in Tip Flow Field of Transonic Compressor Rotor[J]. Journal of Aerospace Power, 2014, 29(5):1145-1153
[11] Wang Hao, Wu Yadong, Ouyang Hua, Du Zhaohui. Circumferential Propagating Characteristics of Tip Leakage Flow Oscillation and its Induced Rotating Pressure Wave[J]. Proceedings of the Institution of Mechanical Engineers, Part A:Journal of Power and Energy, 2016, 230(4):374-387
[12]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[J].航空动力学报,2016, 31(9):2239—2250Wang Hao, Wu Yadong, Ouyang Hua. Aerodynamic Rotating Instability and Fluctuated Characteristics of Tip Clearance Flow in Low Speed Axial Flow Compressor[J].Journal of Aerospace Power, 2016, 31(9):2239-2250
[13] Holste F, Neise W. Noise Source Identification in a Propfan Model by Means of Acoustical Near Field Measurements[J]. Journal of Sound and Vibration, 1997, 203(4):641-665
[2] Baumgartner M,Kameier F, Hourmouziadis J. NonEngine Order Blade Vibration in a High Pressure Compressor[C]//12th International Symposium on Airbreathing Engines, Melbourne, Australia:ISABE, 1995:10-15
[3] 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
[4] 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
[5] M?rzJ, Hah. C, Neise W. An Experimental and Numerical Investigation into the Mechanisms of Rotating Instability[J]. Journal of Turbomachinery, 2002, 124(3):367-374
[6] Hah C, Bergner J, Schiffer H P. Tip Clearance VortexOscillation, Vortex Shedding and Rotating Instabilities in an Axial Transonic Compressor Rotor[R]. ASME Paper GT2008-50105, 2008
[7] Hah C, Voges M, Mueller M. Characteristics of Tip Clearance Flow Instability in a Transonic Compressor[R].ASME Paper GT2010-22101, 2010
[8] Pardo witz B, Tap ken U, Enghardt L. Time-Resolved Rotating Instability Waves in an Annular Cascade[C]//18th AIAA/CEAS Aeroacoustics Conference, Colorado Springs, CO, 2012:4-6
[9]吴艳辉,吴俊峰,稂仿玉,等.轴流压气机转子近叶尖流动的试验和数值研究之二:近失速工况流动特征分析[J].工程热物理学报,2014, 35(1):60-65WU Yanhui, Wu Junfeng, LANG Fangyu, et al. Experimental and Numerical Investigation of Near-Tip FlowField in an Axial Flow Compressor Rotor-Part II:Flow Characteristics at Near-Stall Operating Conditions[J].Journal of Engineering Thermophysics, 2014, 35(1):60-65
[10]付磊,袁巍,宋西镇,等.跨声速压气机转子叶尖流场旋转不稳定现象的数值研究[J].航空动力学报,2014, 29(5):1145-1153FU Lei, Yuan Wei, SONG Zhenxi, et al. Numerical Investigations on Rotating Instability Phenomenon in Tip Flow Field of Transonic Compressor Rotor[J]. Journal of Aerospace Power, 2014, 29(5):1145-1153
[11] Wang Hao, Wu Yadong, Ouyang Hua, Du Zhaohui. Circumferential Propagating Characteristics of Tip Leakage Flow Oscillation and its Induced Rotating Pressure Wave[J]. Proceedings of the Institution of Mechanical Engineers, Part A:Journal of Power and Energy, 2016, 230(4):374-387
[12]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[J].航空动力学报,2016, 31(9):2239—2250Wang Hao, Wu Yadong, Ouyang Hua. Aerodynamic Rotating Instability and Fluctuated Characteristics of Tip Clearance Flow in Low Speed Axial Flow Compressor[J].Journal of Aerospace Power, 2016, 31(9):2239-2250
[13] Holste F, Neise W. Noise Source Identification in a Propfan Model by Means of Acoustical Near Field Measurements[J]. Journal of Sound and Vibration, 1997, 203(4):641-665
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