Nonlinear aeroelastic analysis of airfoil section under stall flutter oscillations and gust loads

2021 ◽  
Vol 102 ◽  
pp. 103250
Author(s):  
L.G.P. dos Santos ◽  
F.D. Marques
Keyword(s):  
Airfoil Section ◽  
Aeroelastic Analysis ◽  
Gust Loads ◽  
Stall Flutter

Nonlinear response of airfoil section with control surface freeplay to gust loads

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 1543-1557 ◽  
Author(s):  
Deman Tang ◽  
Denis Kholodar ◽  
Earl H. Dowell
Keyword(s):  
Nonlinear Response ◽  
Control Surface ◽  
Airfoil Section ◽  
Gust Loads

Nonlinear Response of Airfoil Section with Control Surface Freeplay to Gust Loads

AIAA Journal ◽  
2000 ◽  
Vol 38 (9) ◽  
pp. 1543-1557 ◽  
Author(s):  
Deman Tang ◽  
Denis Kholodar ◽  
Earl H. Dowell
Keyword(s):  
Nonlinear Response ◽  
Control Surface ◽  
Airfoil Section ◽  
Gust Loads

Stall Induced Vibration and Flutter in a Symmetric Airfoil

2006 ◽  
Author(s):  
Sunetra Sarkar ◽  
Hester Bijl
Keyword(s):  
Initial Conditions ◽  
Dynamical Behavior ◽  
Turbine Rotor ◽  
Dynamic Stall ◽  
Aeroelastic Stability ◽  
Aeroelastic Analysis ◽  
Structural Nonlinearity ◽  
Stall Flutter ◽  
The Stability ◽  
Wind Turbine Rotor

In this paper the aeroelastic stability of a wind turbine rotor in the dynamic stall regime is investigated. Two dimensional stall flutter models have been chosen for the aeroelastic stability analysis. Two different aeroelastic models have been considered. First, a pitching oscillation, and second, a flap-edgewise oscillation of an airfoil. Previous nonlinear aeroelastic analysis on such systems are not exhaustive. Parameters like structural non-linearity and initial conditions have not been studied, while these have a significant influence on the overall dynamics. They have now been taken up in the present analysis. The overall study helps towards a better understanding of the stall flutter mechanism in such aeroelastic systems. The study has found a strong influence of structural nonlinearity on the bifurcation pattern. Initial condition, too, plays an important role on the stability behavior as well as on the bifurcation pattern. Other system parameters of influence are nondimensional airspeed and external forcing. Interesting dynamical behavior like period-three and also super-harmonic and quasi-harmonic response have been found in the forced system, not reported before.

Experimental and Numerical Study of Gust Loads on Stall Flutter Initiation

2005 ◽  
Author(s):  
Richard Whiting ◽  
David Delamore-Sutcliffe ◽  
Doug Greenwell
Keyword(s):  
Numerical Study ◽  
Gust Loads ◽  
Stall Flutter

Aeroelastic analysis of a hingeless rotor blade in forward flight

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 843-850
Author(s):  
Seong M. Jeon ◽  
In Lee
Keyword(s):  
Rotor Blade ◽  
Forward Flight ◽  
Aeroelastic Analysis
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