FLUTTER STABILITY OF A DETUNED CASCADE IN SUBSONIC COMPRESSIBLE FLOW

被引：12
作者：
SAWYER, S
FLEETER, S
机构：
[1] Purdue University, West Lafayette, IN
[2] Purdue University, West Lafayette, IN
来源：
JOURNAL OF PROPULSION AND POWER | 1995年 / 11卷 / 05期
关键词：
D O I：
10.2514/3.23918
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
A mathematical model is developed to predict the unsteady aerodynamics of a detuned two-dimensional flat plate cascade in subsonic compressible flow. Aerodynamic detuning is introduced by nonuniform circumferential spacing and chordwise offset. Combined aerodynamic-structural detuning is accomplished by replacing alternate airfoils with splitter blades. A torsion mode stability analysis that considers aerodynamic and combined aerodynamic-structural detuning is developed by combining the unsteady aerodynamic model with a single degree-of-freedom structural model. The effect of these detuning techniques on flutter stability is then demonstrated by applying this model to a baseline unstable 12-bladed rotor and detuned variations of this rotor. This study demonstrates that detuning is a viable passive flutter control technique.
引用
收藏
页码：923 / 930
页数：8
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