【摘要】 实验研究带有孔隙射流结构的某大折转角直扩压叶栅在设计冲角下的出口流场特性,分析了不同孔隙射流位置对出口流场的影响.结果表明:在叶片表面开孔隙后,降低开孔隙的叶高处出口气流折转能力,使叶栅性能下降;孔隙射流使尾迹速度增加,相应的尾迹损失降低,尾迹区范围减小,同时出口气流角沿节距方向分布更加均匀,开孔位置越靠近叶展中部,孔隙射流对尾迹的影响越明显;开多孔方案对叶栅出口流场的影响要强于单孔方案.更多还原

【Abstract】 Experiments of a large turning angle linear compressor cascade with air injection slot were carried out,and detailed outlet flow field characteristics at design incidence were described in this paper.The results show that air injection through slots decreases the turning and diffusion of compressor cascade,the aerodynamic performance of the cascade also decreases;air injection energizes the low energy fluid near wake,increases the velocity of the wake,thus the size of the wake region reduces significantly,pitch-wise distribution of flow outlet angle becomes more uniform,slot position has great effect on wake especially with slot located near mid-span;multi-slot configurations have greater effect on outlet flow field than one-slot configurations.更多还原