涡轮叶片表面气膜出流的数值模拟

深入理解气膜出流对涡轮叶栅气动性能和流场结构的影响对于冷却涡轮的设计具有重要意义。本文利用数值模拟手段对涡轮叶栅表面气膜出流与主流相互作用进行了研究，给出了冷却孔附近的三维流场，分析了叶片表面气膜冷却机理以及吹风比对气膜出流与主流相互作用的影响规律。研究结果表明，吹风比增大将导致叶栅内部流动损失增大，且压力面更为明显；当吹风比增大到一定程度，叶片两侧面上将出现掺混肾型涡流动结构，并且在压力面和吸力面诱导出旋向相反的诱导涡。

Numerical Simulation for the Film Ejections of Turbine Vane

Thorough understanding of film cooling effect on gas turbine cascade flow fields and aerody- namic performance is important in cooling turbine design.The interaction between film ejections and main flow was investigated by numerical simulation in this paper.The features of 3-D flow field near the cooling hole were presented.The mechanism of film cooling and the blowing ratio effect on the interac- tion between film ejections and main flow were analyzed.The results show that the flow loss increases with blow...