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Nonlinear dynamics of a two dimensional airfoil with freeplay in an inviscid compressible flow |
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| Institution: | 1. Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures, College of Mechanical Engineering, Beijing University of Technology, Beijing 100124, China;2. Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA;3. Xinjiang Goldwind Science & Technology Co., Ltd., Urumqi 830000, China |
| Abstract: | A state space model for the aerodynamic loads calculated by means of a linearized CFD code which models the inviscid compressible flow is used to analyze the dynamic behavior of a two dimensional airfoil with a freeplay structural nonlinearity in pitch. The state space aeroelastic equations of motion are utilized to study the existence of Hopf bifurcation points and of limit cycle oscillations. Comparisons between the solutions of the coupled Euler-structural equations and the state space equations are provided. |
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