EFFECT OF CIRCUMFERENTIAL AERODYNAMIC DETUNING ON COUPLED BENDING-TORSION UNSTALLED SUPERSONIC FLUTTER.

被引：0
|
作者：
Hoyniak, D. [1 ]
Fleeter, S. [1 ]
机构：
[1] NASA, Lewis Research Cent,, Cleveland, OH, USA, NASA, Lewis Research Cent, Cleveland, OH, USA
来源：
Journal of Turbomachinery | 1986年 / 108卷 / 02期
关键词：
EQUATIONS OF MOTION - MATHEMATICAL MODELS - SYSTEM STABILITY - TURBOMACHINERY - Rotors;
D O I：
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中图分类号：
学科分类号：
摘要：
A mathematical model is developed to predict the enhanced coupled bending-torsion unstalled supersonic flutter stability due to alternate circumferential spacing aerodynamic detuning of a turbomachine rotor. The translational and torsional unsteady aerodynamic coefficients are developed in terms of influence coefficients, with the coupled bending-torsion stability analysis developed by considering the coupled equations of motion together with the unsteady aerodynamic loading. The effect of this aerodynamic detuning on coupled bending-torsion unstalled supersonic flutter as well as the verification of the modeling are then demonstrated by considering an unstable twelve-bladed rotor, with Verdon's uniformly spaced Cascade B flow geometry as a baseline.
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页码：253 / 260
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