透平叶片表面单排孔气膜冷却效率试验研究  

Test Study on Film Cooling Effectiveness of Turbine Blade with Single Hole Row

作　　者：陈大为 张祎 陈挺 刘钊[2] 谢晔航 贾哲[2] CHEN Dawei;ZHANG Yi;CHEN Ting;LIU Zhao;XIE Yehang;JIA Zhe(Shanghai Electric Power Generation Group,Shanghai 201199,China;Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]上海电气电站集团,上海201199 [2]西安交通大学,西安710049

出　　处：《热力透平》2021年第3期173-177,199,共6页Thermal Turbine

摘　　要：采用稳态红外法试验测量了透平叶片压力面和吸力面气膜孔后冷却效率的分布,分析了吹风比对叶片表面不同位置处单排孔后气膜冷却效率的影响规律,结果发现:吸力面孔排1下游气膜冷却效率随吹风比的增加而降低;孔排2出口附近气膜冷却效率随吹风比的增加先增加后减小,远离孔下游区域的气膜冷却效率随吹风比的增加而增加。压力面孔排1出口附近气膜冷却效率随吹风比的增加而减小,远离孔下游区域的气膜冷却效率随吹风比的增加而增加;孔排2下游气膜冷却效率随吹风比的增加而增加。研究成果可为燃气轮机透平叶片气膜冷却结构设计和冷却空气流量的选取提供参考。Film cooling effectiveness on the turbine blade pressure surface and suction surface after the film hole was measured using the steady-state infrared imaging technology.The influence of the blowing ratio on the film cooling effectiveness of blades with single hole row at different positions was analyzed.The results show that the film cooling effectiveness of the first hole row on the suction side decreases with the increase of blowing ratios.With the increase of blowing ratio,the film effectiveness near the second hole row exit increases first and then decreases,and the effectiveness away from the downstream area of the row increases as the blowing ratio increases.With the increase of blowing ratio,the film effectiveness near the first hole row exit on the pressure side decreases,and the effectiveness away from the downstream area of the row increases as the blowing ratio increases.The film effectiveness of the second hole row increases with the increase of blowing ratios.The research results can provide reference for the design of the film cooling structure of the gas turbine blade and the selection of the cooling air flow rate.

关 键 词：透平叶片 气膜冷却效率 红外成像 孔排位置 吹风比 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]