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以Moore-Greitzer模型为基础,发展了一个预测轴流压缩系统动态失速特性及进气非均匀性影响的二维不可压缩理论模型,并利用该模型计算分析了进气总压畸变的幅值和旋转频率对下游压气机稳定性的影响.计算结果表明:进气总压畸变的幅值和旋转频率对压缩系统的动态失速特性和稳定性都有强烈的影响,旋转频率对旋转失速边界和喘振边界的影响类似.但是,对应系统稳定裕度损失最大值的“危险”响应频率强烈地依赖于其旋转失速的传播频率.
Based on the Moore-Greitzer model, a two-dimensional incompressible theoretical model for predicting the dynamic stall characteristics of the axial-flow compression system and the effects of the intake-air inhomogeneity is developed. The model is used to calculate and analyze the amplitude of the total pressure- The influence of rotation frequency on the stability of the downstream compressor is discussed.The calculation results show that the amplitude and the rotation frequency of the total inlet pressure distortion have a strong influence on the dynamic stall characteristics and stability of the compression system, The effect of the vibration boundary is similar, but the “dangerous” response frequency corresponding to the maximum value of the system stability margin loss strongly depends on the propagation frequency of its rotational stall.