FUN3D-based Sensitivity Analysis for F-15 in Chaotic Flows

The overall technical objective of the Phase II effort is to develop a FUN3D-based adjoint framework using the Non-Intrusive Least Squares Shadowing (NI-LSS) for sensitivity analysis of complex configurations when exposed to buffet loads produced by chaotic flows. The FUN3D-based adjoint framework will be capable of generating buffet loads sensitivities with respect to both shape and sizing design variables. The applicability of the FUN3D-based adjoint framework to complex configurations will be demonstrated on F-15 C/D. Specifically, the component loads sensitivity on the vertical tail of F-15 C/D in chaotic flow will be validated with the trend of the primal solution statistics with respect to the shape of the leading edge extension and wing leading edge sweep angle as well as the structure properties of the F-15 C/D vertical tail.