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本文参考Prandtl关于不可压自由湍流的混合长度理论,研究了轴流压气机叶片尾迹沿轴向的变化规律。得到了尾迹区内的速度分布,尾迹宽度与尾迹区内最大速度亏损值之间的关系式,以及最大速度亏损值沿轴向的衰减公式。理论分析结果与实测结果的比较表明,本文所提供的分析结果可以用来初步预计轴流压气机叶片尾迹沿轴向的衰减程度。
In this paper, Prandtl’s theory of mixed length of incompressible turbulent flow is used to study the axial variation of axial flow compressor blade wake. The relationship between the velocity distribution in the wake region and the maximum velocity loss value in the wake region and the attenuation formula of the maximum velocity loss in the axial direction are obtained. The comparison between the theoretical analysis and the measured results shows that the analysis results provided in this paper can be used to predict the axial attenuation of axial flow compressor blades in the axial direction.