Aerothermoelastic Analysis of Porous 2D Curved Panels

PurposeAn aerothermoelastic analysis of porous 2D curved panels is presented in this study. Porous structures have great properties, including lightweight and high energy absorption. Due to these features, structures with porosities have been utilized in the mechanical and aerospace industries. The material properties of curved panels with the distribution of porosity continuously vary across the thickness direction according to the volume fraction.MethodTo predict unsteady aerodynamic pressure, the third-order piston theory is applied. The steady-state heat conduction equation is considered to model temperature distribution along the thickness direction induced by aerodynamic heating. The von K & PRIME;arm & PRIME;an nonlinear strain-displacement relationship is utilized to describe structural nonlinearity. The solution methodology utilizes the generalized differential quadrature (GDQ) technique to discretize spatial discretization. To achieve numerical solutions, the fourth-order Runge-Kutta method is applied.ResultsThe obtained results are compared with the published literature to ensure reliability and precision. Finally, the influences of several design parameters, such as porosity distribution, yawed flow angle, curvature ratio, and Mach number, on limit cycle amplitude and chaotic behavior were scrutinized by presenting different numerical examples.ConclusionThe results demonstrate that the porosity leads to, the bifurcation point moving to the left side, and also the chaotic motion happens at the lower value aerodynamic pressure.