Aeroelastic Instability Analysis of a Wing Equipped with a Conventional Aerodynamic Control Surface

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Moravej Barzani Sayed Hossein; Mortazavi Mahdi; Shahverdi Hossein

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Journal Paper

Paper Information

Journal: JOURNAL OF AEROSPACE SCIENCE AND TECHNOLOGY Year:2024 | Volume:17 | Issue:2 Page(s): 137-145

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Title

Aeroelastic Instability Analysis of a Wing Equipped with a Conventional Aerodynamic Control Surface

Author(s)

Moravej Barzani Sayed Hossein | Mortazavi Mahdi | Shahverdi Hossein | Issue Writer Certificate

Keywords

High Aspect Ratio Wings

Nonlinear analysis

Aeroelastic Instability

Aerodynamic control surface

Unsteady Aerodynamic Model

Abstract

In this research, for the first time, two types of conventional plain and single-slotted aerodynamic control surfaces have been compared and investigated from an aeroelastic point of view. For aeroelastic modeling, geometrically exact fully intrinsic beam equations are combined with Peter’s unsteady aerodynamic model in an incompressible flow regime. In order to check the aeroelastic stability of the wing, first the resulting non-linear partial differential equations are discretized by using the central finite difference method, and then linearized about the static equilibrium. Finally by using the eigenvalue analysis of linearized equations, the stability of the system versus different parameters are evaluated. The validation of the results has been achieved through comparison with the results presented in the references. Then the effects of various important parameters of the control surface on the speed and frequency of flutter instability have been investigated for two types of conventional aerodynamic control surfaces for the first time and hence this is the main novelty of this study. It is found that the improving trend of the single-slotted control surface is more pronounced at lower chord ratios and the location closer to the wingtip than the plain control surface. Also, the importance of paying attention to the type of control surface in aeroelastic stability became more clear.

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