跨声速工况下流体诱发叶片振动研究

An investigation of flow induced blade vibrations at the transonic operating condition

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

摘要: 对同一跨声速风扇的非定常流场进行了跨声与亚声两种工况下的数值模拟.对两个工况下流场计算得到的转子叶片表面非定常气动激振力进行频谱分析,并对其进行对比分析,从而得到跨声工况下气动激振力特性.应用ANSYS软件的瞬态分析方法进行了叶片的强迫响应分析,对跨声和亚声两种工况下的叶片强迫响应进行对比分析,从而得到跨声工况下叶片强迫响应特性.
- 航空、航天推进系统 /
- 叶片 /
- 转/静干涉 /
- 流场计算 /
- 瞬态分析 /
- 强迫响应
Abstract: The unsteady flow field of the same transonic fan at both transonic and subsonic operating conditions was simulated numerically.The periodic unsteady aerodynamic forces of the flow field at both transonic and subsonic operating conditions were analyzed by Fourier Transform Algorithm,and then compared to obtain the unsteady aerodynamic characteristics at tansonic operating condition.The forced response of the rotor blade was analyzed with ANSYSby using the method of transient response analysis.The forced response of the rotor blade between transonic and subsonic operating conditions was analyzed comparatively to find out the characteristics of the forced response.
- aerospace propulsion system /
- blade /
- rotor/stator interactions /
- flow field computation /
- transient analytical method /
- forced response

[1]	郭恩民.叶轮机流动诱发振动现象的非定常气动探索[D].北京:北京航空航天大学能源与动力工程学院,1997.GUO Enmin.Search of unsteady pneumatic phenomenon of fluid in fluence in impeller machine[D].Beijing:School of Jet Propulsion,Beijing University of Aeronautic and Astronautics,1997.
[2]	Vahdati M,Sayma A I,Imregun M.Prediction of high and low engine order forced responses for an LP turbine blade[R].AIAA-98-3719,1998.
[3]	Vahdati M,Sayma A I,Imregun M.An integrated nonlinear approach for turbomachinery forced response prediction.Part Ⅰ:Formulation[J].Journal of Fluids and Structures,2000,14:87-101.
[4]	Vahdati M,Sayma A I,Imregun M.An integrated nonlinear approach for turbomachinery forced response prediction.Part Ⅱ:Case studies[J].Journal of Fluids and Structures,2000,14:103-125.
[5]	Volker C,Ralf K,Stefan S.Coupled simulation of flowstructure interaction in turbomachinery[J].Aerospace Science and Technology,2003,7(4):298-306.
[6]	孟越,李琳,李其汉.尾迹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.