锯齿冠的结构特性与设计  

Structural Characteristics and Design of Serrated Shroud

作　　者：李文明[1] 

机构地区：[1]沈阳发动机设计研究所,沈阳110015

出　　处：《航空发动机》2009年第1期18-22,共5页Aeroengine

摘　　要：根据锯齿冠结构原理,导出了包含锯齿冠结构特性参数(λ、ψ、βu、Δβ)的关系式,即锯齿冠结构特性方程,并将其图解成锯齿冠结构特性曲线,直观、清晰地描述了各特性参数之间的关系和变化规律;揭示了由实际条件产生的"紧度偏差",论述了锯齿冠结构的设计方法。同时指出,选择过大的接触角会使叶冠失效而引发叶片故障。The relationship of characteristic parameters（λ、ψ、βμ、Δβ）of serrated shroud was derived based on the structure principle of serrated shroud, and was diagrammatized to the characteristics of serrated shroud. The relations and laws of change of the parameters were described clearly and visually. The ＂tension deviation＂ derived by actual condition was revealed and the design method of serrated shroud was discussed. The oversized contact angle selected would result in blade failure.

关 键 词：锯齿冠 设计 紧度偏差 接触角 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程] TN783[电子电信—电路与系统]