The aeroelastic characteristics of high aspect ratio wing

Abstract

Owing to the elasticity, the large deformation was brought in the high aspect ratio wing in the flight. The large deformation had a great influence on the flight performance. In this paper, the loosely coupled method was used for the research of high aspect ratio wing aeroelastic problems. The Navier–Stokes equations were solved for fluid domain computation, and the nonlinear finite element method was adopted for solid domain computation. The data exchange program and mesh regeneration progress were adopted for fluid–structure interface problem. Finally, the aerodynamic characteristics of high aspect ratio wing were obtained under different fly conditions. In addition, to validate the proposed method, the flutter analysis of AGARD 445.6 wing is carried out and compared with the experimental data. The numerical result validates the proposed computational fluid dynamics/computational structural mechanics method.

Stall nonlinear aeroelastic effects and active control of thin-walled composite blade with piezoelectric patches embedded

“…Based on the strip theory, the nonlinear term in the aerodynamic formula of the equation is also expressed in the form of strip. Inserting equation (19) into equation (18), combining the aerodynamic variables in the aerodynamic formula of equations ( 12)-( 16), and assuming…”

“…The Navier-Stokes equations were solved for fluid domain computation, and the nonlinear finite element method was adopted for solid domain computation, with the data exchange program and mesh regeneration progress adopted for fluid-structure interface problem to obtain the nonlinear aerodynamic characteristics. 19 Because these sensitive structures experience time-varying loads, their safe and effective design requires accurate stability prediction. There are two main aeroelastic instabilities in the vibrations of wind turbine blades.…”