时域法在压气机转子气动弹性计算中的应用

徐可宁; 王延荣

时域法在压气机转子气动弹性计算中的应用

北京航空航天大学能源与动力工程学院,北京 100191

基金项目: 国家重点基础研究发展计划(2007CB210103)

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出版历程
- 收稿日期: 2010-08-16
- 修回日期: 2010-10-20
- 刊出日期: 2011-01-28

Application of time domain method in aeroelastic computations for compressor rotors

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics,Beijing 100191,China

摘要

摘要: 发展了用于三维叶轮机气动弹性计算的软件系统AEAS(aeroelastic analysis system).该系统采用时间推进法求解转子叶片的瞬态位移及动应力,以模拟压气机转子中的气动弹性现象.AEAS主要应用于强迫响应分析和颤振分析,强迫响应分析中,在坎贝尔图上共振点对应的工况下,在转子叶片上施加周期性变化的非定常压力场,通过计算动应力的振幅预测转子的危险应力状态;颤振分析中,交替调用结构求解模块和非定常流体求解模块,通过所获得的叶片瞬态动应力预测颤振是否发生.对真实叶片进行气动弹性计算,可以看出所提供的方法和软件系统可以直观地反映流体作用下叶片的振动形式和动应力水平,具有工程应用价值.
- 气动弹性 /
- 强迫响应 /
- 颤振 /
- 时间推进法 /
- 有限单元法
Abstract: An aeroelastic analysis system(AEAS) was been designed to perform aeroelastic analysis for three-dimensional turbomachinery rotor blade models.A time-marching method was applied in AEAS for transient displacement and dynamic stress responses of rotor blades,thus simulating aeroelastic phenomena in compressor rotors.Forced response and flutter analyses modules are two major aeroelastic modules in the AEAS code.In forced response analysis,periodic unsteady pressure field was applied to rotor blades at possible resonances on Campbell diagram to compute the amplitudes of dynamic stresses,therefore dangerous conditions of rotors were assessed.In flutter analysis,the structural solver and the unsteady flow solver were invoked alternately; transient responses of blades were provided to determine whether flutter occurs.Numerical results show good agreement with experimental measurements,indicating that it is possible to obtain dynamic stresses in fluid induced vibration analyses using the time-marching method.
- aeroelasticity /
- forced response /
- flutter /
- time-marching method /
- finite element method

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