本文对变几何收敛通道中扩压叶栅的主要性能参数(总压损失系数ω、增压比π、扩散因子D)进行了初步理论分析研究,推导出高亚音速范围内该类型叶栅的几何参数、气流参数、尾迹附面层特性参数与叶栅主要性能参数的关联方程,并在亚音速范围内,将采用上述方程得到的计算值同实验值进行了比较,表明两者吻合较好,从而为压气机叶栅设计时选取主要参数提供了依据。 In this paper, the primary performance parameters (total pressure loss coefficient ω, supercharging pressure ratio π, diffusivity D) of the diffuser cascade in the variable geometry convergence channel are analyzed and studied. Geometric parameters, airflow parameters, the relationship between the parameters of the wake and the main performance parameters of the cascade, and in the subsonic range, the calculated value obtained by the above equation is compared with the experimental values, indicating that the two agree well , So as to provide the basis for selecting the main parameters of compressor cascade design.