轴向间距对转子叶片气动激励的影响

肖大启; 郑赟; 杨慧

轴向间距对转子叶片气动激励的影响

北京航空航天大学能源与动力工程学院航空发动机数值仿真研究中心,北京 100191

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出版历程
- 收稿日期: 2012-05-18
- 刊出日期: 2012-10-28

Effect of axial spacing on aerodynamic excitation of rotor blade

Aeroengine Numerical Simulation Research Center, School of Jet Propulsion,Beijing University of Aeronautics and Astronautics, Beijing 100191,China

摘要

摘要: 使用自行开发的非定常流动分析程序对尾迹、势干扰和激波共同作用下的某高压涡轮级非定常流动进行数值模拟,研究引起叶片表面非定常压力扰动的气动激励机制.通过叶片通道内的畸变跟踪,结合叶片表面压力扰动时空图,对激励源进行识别和分类;通过对叶片表面非定常压力的频域分析,建立了激励源与上游叶片通过频率的关系;定义压力扰动均方根作为气动激励强度的量化参数,分析叶排不同轴向间距下气动激励的变化规律.结果表明:减小轴向间距并保持涡轮级的落压比和效率基本不变时,气动激励随着轴向间距的减小而增强;压力扰动的高阶分量可能会激励扭转模态为主的振动.
- 轴向间距 /
- 气动激励 /
- 高压涡轮 /
- 非定常流动 /
- 数值模拟
Abstract: Mechanism of aerodynamic excitation due to wake,potential and shock wave interaction was studied by numerical simulation of unsteady flows in a high pressure turbine stage.The excitation source was identified by analyzing a space-time map and distortion tracing technique.The excitation source was identified as the upstream blade-passing frequency by analysis of unsteady pressure on the blade surface.The unsteady excitation strength was quantified by normalized unsteady disturbances.Several configurations with different axial spacings were calculated.The results indicate that with small changes in axial spacing while maintaining same time-average aerodynamic characteristics,the aerodynamic excitation increases while reducing axial gap and the aerodynamic excitation may excite the blade vibration in a torsion mode.
- axial spacing /
- aerodynamic excitation /
- high pressure turbine /
- unsteady flow /
- numerical simulation

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参考文献(18)

[1]	陈懋章.风扇/压气机技术发展和对今后工作的建议[J].航空动力学报,2002,17(1):1-15. CHEN Maozhang.Development of fan/compressor techniques and suggestions on further researches[J].Journal of Aerospace Power,2002,17(1):1-15.(in Chinese)
[2]	黄家经,彭建.压气机转子叶片高周疲劳裂纹排故研究 //中国航空学会第十四届发动机结构强度振动学术研讨会论文集.北京:中国航空学会,2008:72-75.
[3]	李万爱,任玉新,符松.多级轴流式低速压气机轴向间距的影响 //第十四届全国计算流体力学会议论文集.北京:中国空气动力学会,2009:941-945.
[4]	邹正平,叶建,张永新,等.非定常流动对叶片表面负荷分布影响的数值模拟研究[J].燃气涡轮试验与研究,2006,19(1):21-26. ZOU Zhengping,YE Jian,ZHANG Yongxin,et al.Numerical simulation of unsteady flow effects on turbine blade loading distributions[J].Gas Turbine Experiment and Research,2006,19(1):21-26.(in Chinese)
[5]	季路成,项林,黄海波,等.1+1/2对转涡轮叶排轴向间距对性能影响的研究[J].工程热物理学报,2002,23(5):565-568. JI Lucheng,XIANG Lin,HUANG Haibo,et al.Investigation about effects of axial gap on the performance of vaneless counter-rotating turbine[J].Journal of Engineering Thermophysics,2002,23(5):565-568.(in Chinese)
[6]	李传鹏,胡骏,张燎原,等.轴向间距变化对轴流压气机全流量特性的影响[J].推进技术,2004,25(6):508-511 LI Chuanpeng,HU Jun,ZHANG Liaoyuan,et al.Effects of axial spacing on compressor performance in all flow range[J].Journal of Propulsion Technology,2004,25(6):508-511.(in Chinese)
[7]	闫朝,季路成,陈江,等.轴向间距对时序效应影响的研究[J].工程热物理学报,2004,25(2):220-222. YAN Chao,JI Lucheng,CHEN Jiang,et al.Investigation about the effects of axial gaps on clocking effects[J].Journal of Engineering Thermophysics,2004,25(2):220-222.(in Chinese)
[8]	王梅,江和甫,吕文林.在尾流激振情况下叶片振动应力预估技术[J].航空动力学报,2007,22(4):608-613. WANG Mei,JIANG Hefu,LV Wenlin.Method to predict the blade vibration stress induced by wake flow[J].Journal of Aerospace Power,2007,22(4):608-613.(in Chinese)
[9]	孟越,李琳,李其汉.尾流激振情况下叶片强迫响应瞬态分析方法[J].北京航空航天大学学报,2006,32(6):671-674 MENG Yue,LI Lin,LI Qihan.Transient analytical method of vane forcing response under stator-rotor wake influence[J].Journal of Beijing University of Aeronautics and Astronautics,2006,32(6):671-674.(in Chinese)
[10]	Dring R P,Joslyn H D,Hardin L W,et al.Turbine rotor-stator interaction[J].Journal of Engineering for Power,1982,104(10):729-742.
[11]	Korakianitis T.Influence of stator-rotor gap on axial-turbine unsteady forcing functions[J].AIAA Journal,1993,31(7):1256-1264.
[12]	Laumert B,Mårtensson H,Fransson T H.Investigation of unsteady aerodynamic blade excitation mechanisms in a transonic turbine stage Part Ⅰ:phenomenological identification and classification[J].Journal of Turbomachinery,2002,124(7):410-418.
[13]	Laumert B,Mårtensson H,Fransson T H.Investigation of unsteady aerodynamic blade excitation mechanisms in a transonic turbine stage Part Ⅱ:analytical description and quantification[J].Journal of Turbomachinery,2002,124(7):419-428.
[14]	Jocker M.Numerical investigation of the aerodynamic vibration excitation of high-pressure turbine rotors .Stockholm,Sweden:Royal Institute of Technology,2002.
[15]	郑赟.基于非结构网格的气动弹性数值方法研究[J].航空动力学报,2009,24(9):2069-2077. ZHENG Yun.Computational aeroelasticity with an unstructured grid method[J].Journal of aerospace power,2009,24(9):2069-2077.(in Chinese)
[16]	ZHENG Yun,YANG Hui.Coupled fluid-structure flutter analysis of a transonic fan[J].Chinese Journal of Aeronautics,2011,24(3):258-264.
[17]	Chima R V.Calculation of multistage turbomachinery using steady characteristic boundary xonditions .Reston,VA:36th Aerospace Sciences Meeting & Exhibit,1998.
[18]	Mathur S R.Unsteady flow simulations using unstructured sliding meshes .Reston,VA:25th AlAA Fluid Dynamics Conference,1994.