压气机转子叶片所受激励的相关性

方立成; 李舜酩; 杜建建; 陈茉莉

压气机转子叶片所受激励的相关性

南京航空航天大学能源与动力学院,南京 210016

基金项目: 国家自然科学基金(50675099)

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出版历程
- 收稿日期: 2010-05-26
- 修回日期: 2011-01-12
- 刊出日期: 2011-06-28

Study on the correlative property of excitation on compressor rotor blades

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

摘要

摘要: 为了分析复杂流场对叶片的作用,研究了压气机内三种非定常气动激振形式:上游叶片排尾迹、进气畸变和旋转失速的相关性.通过在单级低速轴流压气机试验台上获得的数据,采用自相关和互相关方法,研究三种激励的特性,分析激振信号的相关性机理.结果表明:多次自相关可以清晰地显示出信号的特征频率,有效地抑制干扰噪声;激励信号之间具有很强的相关性,且相关程度主要由偶数阶激励信号产生;两两激励信号之间的互相关频率成分幅值较低,低于各信号的自谱图在该处的幅值;而三个激励信号之间的相关程度较低,其相关性主要存在于偶数阶激励信号的前两阶.
- 周期性激振 /
- 进气畸变 /
- 旋转失速 /
- 相关分析 /
- 压气机转子叶片
Abstract: The correlation of the three excitation forms (up-stream blade rows wakes, inlet distortion and rotating stall)was studied to analyze complex flow field of the blade role. The experimental samples were obtained by a single-stage low speed axial compressor test rig.Research focused on analysis of these three types of periodical excitation,employed autocorrelation and cross-correlation approach.Experimental results show that there is high correlation between excitation signals,and the correlation degree rely heavily on even signal. In addition,there is lower amplitude of cross-correlation frequency than amplitude of autocorrelation signal;There is low magnitude correlation among three excitations,correlation mainly exist in the first two of the even degree signal.
- periodical excitation /
- inlet distortion /
- rotating stall /
- correlation analysis /

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参考文献(12)

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