Development of an Euler/Navier-Stokes aeroelastic method for three-dimensional vehicles with multiple flexible surfaces

In 1989, an aeroelastic analysis method coupling high-level Computational Fluid Dynamics (CFD) methods with linear structural models was developed to analyze structurally flexible fighter aircraft This method, known as the Euler/Navier-Stokes 3Dimensional Aeroelastic (ENS3DAE) method was written to analyze both the steady and unsteady aerodynamic and aeroelastic performance of aircraft Initially, the code was validated for steady rigid sad structurally flexible configurations operating at a wide range of flight conditions. Since 1989, many enhancements to the aerodynamic and aeroelastic modules of the code have been added, including aeroelastic analysis of shell structures and vertical tails, aeroelastic analysis of multiple flexible surfaces, enhanced dissipation models, and real-gas capability. However, the program has not been validated for these options or for unsteady flows. The analyses described in this document are a portion of the effort to accomplish this validation.