叶尖凹槽对某燃气涡轮叶尖间隙流动影响的研究

采用数值模拟的方法研究了叶尖凹槽对某燃气涡轮性能及流场的影响,并对其作用机理进行了分析。结果表明:叶尖凹槽对涡轮性能的影响较小,可减小叶尖泄漏流流量并提高涡轮效率。相对平顶叶片,凹槽叶片涡轮效率最大可提高0.06%。在5%～30%叶尖凹槽高度范围内,凹槽高度越大,叶尖泄漏涡强度越小,涡轮效率提升越大;在60%～90%叶尖凹槽长度范围内,叶尖凹槽长度越长,叶尖泄漏涡强度先减小后增大,效率提升幅度也是先增大后减小。     

基于光场成像技术的气膜冷却孔几何参数检测（英文）

In a high thrust-weight-ratio aero-engine, turbine blades are exposed to extremely high temperature and pressure which sets higher demands in the blade cooling technology. To boost film-cooling effectiveness, an accurate,efficient, and all-sided inspection of film cooling holes is urgently requested to ensure the quality of turbine blades. The tiny size of film-cooling holes adds to extreme difficulties in the inspection process both by contact and non-contact measurement. This paper proposed a ...