Dynamical Stability Analysis of a Fluid Structure Interaction System Using a High Fidelity Navier-stokes Solver

• DOI: 10.1016/j.proeng.2016.05.107
• Publication Date: 2016-05-25T19:58:59Z
• Authors: Chandan Bose; Sandeep Badrinath; Sayan Gupta; Sunetra Sarkar
• Keywords: Flutter; Inviscid flow; Solver; Fluid–structure interaction; Aeroelasticity

The present paper investigates the flow induced dynamics of a non-linear fluid-structure interaction (FSI) system comprising symmetrical NACA 0012 airfoil supported by springs. Two methods are used in calculating aerodynamic loads: linear analytical approach and full Navier-Stokes (N-S) solution. is based on assumption potential theory rigid wake. Wind velocity as bifurcation parameter shows that structural response undergoes supercritical Hopf bifurcation. However, loads predict unrealistic onset at low values solid to fluid added mass ratio (μ) relevant application flapping wing micro air vehicles (MAVs), showing extremely large amplitude oscillations. These observations render use an inviscid meaningless such parametric regimes. Hence, we propose N-S solver emphasize limit applicability theory. Moreover, inclusion viscous effects can potentially result interesting dynamical behavior has not been captured approach. A stability analysis carried out for different variations μ structure system.