加工偏差对簸箕形气膜孔冷却效果的影响  

Impact of machining deviation on cooling effect of dustpan-shaped film hole

作　　者：郝旭生 李洋 薛树林 李亚雄 HAO Xusheng;LI Yang;XUE Shulin;LI Yaxiong(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;Hunan Key Laboratory of Turbomachinery on Small and Medium Aero-Engine,Zhuzhou 412002,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002 [2]中小型航空发动机叶轮机械湖南省重点实验室,湖南株洲412002

出　　处：《燃气涡轮试验与研究》2024年第2期29-34,共6页Gas Turbine Experiment and Research

摘　　要：采用数值模拟方法研究了目前簸箕形气膜孔实际生产过程中存在的2种典型加工偏差对气膜冷却效果的影响,并和传统椭圆形气膜孔及理论簸箕形气膜孔进行了对比分析。结果表明:相同孔径及冷气流量下,簸箕形气膜孔的冷却效果高于椭圆形气膜孔,加工偏差会造成簸箕形气膜孔冷却效果较大程度下降。计算结果对涡轮冷却叶片实际气膜孔加工及叶片验收有一定的指导意义。The impact of two kinds of typical machining deviation in actual production process on the cooling effect of dustpan-shaped film holes was studied by numerical simulation.And compared with that of the elliptic film hole and the theoretical dustpan-shaped film hole.The results show that the cooling effect of the dustpan-shaped film hole is higher than that of the elliptic film hole with the same hole diameter and the same cooling air flow.The machining deviation will cause the cooling effect of the dustpan-shaped film hole to decrease greatly.The results show some reference to the actual film hole machining and blade acceptance of turbine cooling blades.

关 键 词：航空发动机 涡轮冷却叶片 簸箕形气膜孔 加工偏差 冷却效果 数值研究 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]