摘要
利用高精度红外测温技术,开展了叶栅上游间隙射流对于扇形叶栅端壁气膜冷却性能影响的实验研究。实验测量了不同间隙射流质量流量比以及间隙位置条件下的端壁气膜有效度。测量结果表明,间隙射流对于端壁前部区域能够形成一定的冷却保护作用,受到端壁二次流的影响,端壁气膜主要集中靠近吸力面一侧。随着质量流量比的增加,气膜有效度提高,气膜分布范围扩大。在一定范围内,随着间隙距叶栅前缘距离的增大,间隙射流对端壁的冷却能力降低,端壁气膜有效度也随之降低。当间隙射流质量流量比分别为1.0%、1.5%、2.0%时,间隙位置从0.15Cx增大到0.45Cx,最高端壁气膜有效度分别降低了78%、68%和58%。
Based on the high-precision infrared temperature measurement technology,the experimental study on the effect of the upstream slot jet of the cascade on the endwall film cooling performance of the annular cascade is carried out.The experiment measured the endwall film cooling effectiveness under different mass flow ratio of slot jet and under different slot locations.The measurement results show that the slot jet can form a certain film cooling protection effect on the front part of the endwall,which is affected by the secondary flow of the endwall,and the endwall cooling film is mainly concentrated on the suction side.As the mass flow ratio increases,the film cooling effectiveness increases and the cooling film distribution range expands.Within a certain range,as the distance between the slot and the leading edge of the blade increases,the endwall film cooling effectiveness also decreases.When the slot jet mass flow ratio is 1.0%,1.5%,2.0%,respectively,the distance between the slot and the leading edge of the blade increases from 0.15 Cx to 0.45 Cx,and the peak endwall film cooling effectiveness is reduced by 78%,68% and 58%.respectively.
作者
姚韵嘉
祝培源
陈云
宋立明
李军
YAO Yun-Jia;ZHU Pei-Yuan;CHEN Yun;SONG Li-Ming;LI Jun(School of Energy & Power Engineering, Xi'an Jiaotong Universtiy, Xi'an 710049, China;AVIC Shenyang Engine Design Institute, Shenyang 110015, China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2019年第10期2327-2333,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51676149)
关键词
间隙射流
端壁
气膜冷却
红外测温
扇形叶栅
slot jet
endwall
film cooling
infrared temperature measurement technology
annular cascade
