气动非谐对叶片非定常气动激振力影响

孟越; 李琳; 李其汉

气动非谐对叶片非定常气动激振力影响

北京航空航天大学能源与动力工程学院, 北京 100083

计量
- 文章访问数: 1546
- HTML浏览量: 1
- PDF量: 485
- 被引次数: 0
出版历程
- 收稿日期: 2006-06-19
- 修回日期: 2006-11-28
- 刊出日期: 2007-07-28

Study on the influence of aerodynamic mistuned on unsteady aerodynamic force of blade

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 为降低转子叶片在前排静子叶片尾流激振情况下的共振应力, 提高转子叶片疲劳寿命, 对静子叶片的气动非谐设计进行研究.对静子叶片的气动非谐设计考虑了两种方案, 一种为非均匀叶栅设计, 另一种为不对称叶栅设计.通过对静子-转子模型流场进行非定常计算, 比较了两种非谐设计思想下转子叶片表面气动激振力频谱成分和幅值大小.分析结果标明:非均匀叶栅非谐设计并不能降低转子叶片表面激振力, 同时会引起频率成分和幅值都较大的倍频成分;不对称叶栅非谐设计虽然会引起与转速同频的较大幅值激振力成分, 但从整体考虑可有效降低叶片振动应力.
- 航空、航天推进系统 /
- 气动非谐 /
- 非均匀非谐 /
- 不对称非谐
Abstract: To reduce the resonance stress of rotor blade under wake aerodynamic force of front stator vane,and also extend the fatigue endurance,the aerodynamic mistuned of stator vane was analyzed.Two kinds of design solutions of stator vane's aerodynamic mistuned were considered,one: uneven stator mistuned,and the other: asymmetry stator mistuned.Through calculation of unsteady flow field of stator-rotor model,the spectrum and amplitude of unsteady aerodynamic force of two mistuned design packages were compared.The results show that,uneven stator mistuned design couldn't reduce aerodynamic force of rotor blade,but lead to bigger frequency division of spectrum and amplitude.Though asymmetry stator mistuned may result in bigger amplitude aerodynamic force with the same frequency as rotational speed,it could reduce effectively the aerodynamic force of blade as a whole.
- aerospace propulsion system /
- aerodynamic mistuned /
- uneven stator mistuned /
- asymmetry stator mistuned

HTML

参考文献(6)

[1]	宋兆泓.航空燃气涡轮发动机强度设计[M].北京:北京航空航天大学出版社,1988.
[2]	王建军,李其汉,朱梓根.失谐叶片-轮盘结构系统振动局部化问题的研究进展[J].力学进展,2000,30(4):517-528.WANG Jianjun,LI Qihan,ZHU Zigen.Vibratory locatization of mistuned bladed disk assemblies-a review[J].Advances In Mechanics,2000,30(4):517-528.
[3]	Rivas-Guerra A J,Mignolet M P.Local/global effects of mistuning on the forced response of bladed disks[J].Journal of Engineering for Gas Turbines and Power,2004,126(1):131-141.
[4]	Lim S H,Christophe P,Castanier M P.Predicting blade stress levels directly from reduced-order vibration models of mistuned bladed disks[J].Journal of Turbomachinery,2006,128(1):206-210.
[5]	Gottfried D A,Fleeter S.Passive detuning for HCF reduction[R].AIAA 2002-3634,2002.
[6]	祈明旭,丰镇平,KANG Shun,等.轴流透平级动静干涉的非定常效应及其对气动性能的影响[C]//工程热物理学会热机气动热力学学术会议论文集.中国工程热物理学会编,中山:2002,395-401.QI Mingxu,FENG Zhenping,KANG Shun,et al.Unsteady effection and influence of pneumatic performance under stator-rotor wake in axial-flow turbins[C]//Academic conference paper corpus of thermo-engine pneumatic thermodynamics conference of society of engineering thermophysics.Society of engineering thermophysics,Zhongshan:2002,395-401.