Abstract: To investigate the effects of receiver holes on the flow characteristics of pre-swirl system，based on a 3D model，a steady state numerical simulation of the pre-swirl system with the receiver holes angles between0°and 60°was carried out. The results show that when the circumferential velocity of airflow is higher than that ofthe receiver holes，the vortexes near the receiver holes disappear gradually，and the effective flow areas increase with the angle of the receiver holes increasing. When the circumferential velocity of airflow is lower than that ofthe receiver holes，the vortexes gradually become larger，and the guiding effect of the receiver holes on the air.flow is strengthened with the receiver holes angle increasing. As the receiver holes angles increase，static temper. ature and static pressure of airflow near the receiver holes decrease，the dimensionless mass flow rate and the temperature drop coefficient of pre-swirl system increase，and the total pressure loss coefficient slightly rises. The temperature drop coefficient increases by 22.7%，and the total pressure loss coefficient increases by 1.31% as the receiver holes angles increase from 0°to 60°.

Key words: Pre-swirl；Flow characteristics；Mass flow；Temperature drop；Pressure loss

摘要： 为研究接受孔对预旋系统流动特性的影响，基于简化的三维模型，对接受孔角度为 0°～ 60°的预旋系统进行了稳态数值模拟。结果表明，当气流周向速度高于接受孔旋转速度时，随着接受孔角度的增加，接受孔处的漩涡逐渐消失，有效流通面积增加。当气流周向速度低于接受孔旋转速度时，随着接受孔角度的增加，产生的漩涡逐渐变大，接受孔对气流的导向作用加强。随着接受孔角度的增加，接受孔附近气流的静温以及静压均减小，预旋系统无量纲质量流量和温降系数均增大，预旋系统总压损失系数呈微弱的上升趋势。接受孔角度从 0°增至 60°时，预旋系统温降系数增大了 22.7%，总压损

关键词: 预旋；流动特性；质量流量；温降；压力损失