不同安装角下透平静叶气膜冷却传热特性的数值研究

Numerical Investigation on Film Cooling Heat Transfer Characteristics of Turbine Stator Blade at Different Setting Angles

通过Fluent软件对吹风比M=1.0时,透平静叶不同安装角(β=40°、50°、60°、70°、80°和90°)的表面传热特性进行了研究,分析了冷却效率和壁面努塞尔数的变化,结果表明:随安装角的增大,压力面射流孔下游附近的冷却效率提高,而吸力面恰好相反,综合看来,β=70°时冷却效果最好;在压力面,β=90°、80°和70°时,Nu的峰值小;β=60°、50°和40°时,Nu峰值大,且更靠近射流孔下游。在吸力面,Nu总体呈上升趋势。

The heat transfer characteristics of blade were simulated by Fluent software at blowing ratio M=1.0 and different setting angles（β=40°,50°,60°,70°,80°and 90°）,and the cooling efficiency of transformation and wall Nusselt number were analyzed.Results showed that：With the setting angles increased,the cooling efficiency near the jet-hole downstream area of pressure surface becomes high,and the suction side is just the opposite,taken together,when β=70° the cooling effect is best;At the same blowing ratio,in the pressure surface,the peak wall Nusselt number of β = 90°,80° and 70° is larger than β = 60°,50° and 40°,and more close to the downstream.In suction surface,wall Nusselt number overall rise.