透平静叶表面多排孔气膜冷却特性试验研究  

Experimental Study on Film Cooling Characteristics of Multi-row Holes on Turbine Blade Surface

作　　者：何磊 陈大为[1] 张祎 王海峰 刘钊[3] 竺晓程 杜朝辉[2] HE Lei;CHEN Dawei;ZHANG Yi;WANG Haifeng;LIU Zhao;ZHU Xiaocheng;DU Zhaohui(Shanghai Electric Power Generation Group,Shanghai 201199,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Energy and Power Engineering,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]上海交通大学机械与动力工程学院,上海200240 [3]西安交通大学能源与动力工程学院,西安710049

出　　处：《动力工程学报》2021年第12期1040-1044,1068,共6页Journal of Chinese Society of Power Engineering

摘　　要：为研究燃气轮机透平静叶表面的气膜冷却特性,搭建了平面叶栅气膜冷却试验台,采用红外成像技术测量了带有多排扇形气膜孔的透平静叶表面气膜冷却有效度和传热系数,分析了不同吹风比下静叶压力面和吸力面不同孔排下游气膜冷却有效度和传热系数的分布规律。结果表明:随着吹风比的增大,静叶压力面各排孔后气膜冷却有效度增大,静叶吸力面孔排1下游气膜冷却有效度减小,吸力面孔排2和吸力面孔排3下游气膜冷却有效度先增大后减小,吸力面孔排4下游气膜冷却有效度增大;大吹风比时,气膜出流使得静叶表面大部分区域展向平均传热系数相比无气膜时小幅增大。Film cooling characteristics of the gas turbine blade were studied on the linear-cascade film cooling test rig. The film cooling effectiveness and heat transfer coefficient of a turbine blade with multi-row fan-shaped film holes were measured by infrared imaging technology. The distribution of film cooling effectiveness and heat transfer coefficient of the pressure surface and suction surface of the blade under different blowing ratios were analyzed. Results show that with the increase of the blowing ratio, the film cooling effectiveness in downstream of most of the holes on the pressure surface increases, the film cooling effectiveness of the first rows film holes on the suction surface decreases, and the film cooling effectiveness of the second and the third rows film holes on the suction surface increase first and then decrease with increasing blowing ratios. Meanwhile, the film cooling effectiveness in the downstream of the fourth rows holes on the suction surface increases. When the blowing ratio is large, the film outflow makes the heat transfer coefficient of most areas of the blade surface increase slightly compared with that without film.

关 键 词：透平叶片 气膜冷却有效度 传热系数 红外成像 吹风比 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]