角度微調對渦輪葉片之應力響應分析

Investigation on the Stress Variation of Turbine Blade by Minute Blade Angle Adjustment

袁廣麟(Kuang-Lin Yuan) ； 李興軍(Hsing-Juin Lee)

《航空太空及民航學刊.系列B》 39卷1期 (2007/04) Pp. 33-38

https://doi.org/10.6124/JAAA.200704_39(1).05

摘要

現今航空發動機常被要求具備較高的性能、較高的速度、較高的溫度、較輕的重量、較高的可靠度及較長的壽命。?了達成上述目標，渦輪引擎設計者必須面對葉片根部因應力過高而造成之疲勞破壞。本文之主要目的是藉由有限元素法，在不降低性能條件下，調整葉片角度利用傾斜葉片離心力來平衡氣動力所造成負載以降低葉片應力，達到增加葉片疲勞壽命之目標。

關鍵字

渦輪葉片 ； 角度微調 ； 疲勞壽命 ； 應力降低 ； 有限元素法

並列摘要

Nowadays aircraft engine is increasingly requested for higher performance, higher speed, higher temperature, lighter weight, higher reliability and longer life. To successfully achieve these objectives the turbine engine designer must face the problem of preventing turbine blade fatigue failure due to the high stress in its root area. With the aid of finite element analysis, the main purpose of this paper is to reduce the stress of blade root, without degrading the engine performance, by adjusting the blade angle in order to take advantage of centrifugal force of blade slant to counterbalance the relevant aerodynamic force, and lengthen blade fatigue life.

並列關鍵字

Turbine blade ； Minute angle ； Stress reduction ； Fatigue life ； FEM