Discrete Adjoint-Based Design for Unsteady Turbulent Flows on Dynamic Overset Unstructured Grids

Eric Nielsen, Boris Diskin
2012 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition   unpublished
A discrete adjoint-based design methodology for unsteady turbulent flows on threedimensional dynamic overset unstructured grids is formulated, implemented, and verified. The methodology supports both compressible and incompressible flows and is amenable to massively parallel computing environments. The approach provides a general framework for performing highly efficient and discretely consistent sensitivity analysis for problems involving arbitrary combinations of overset unstructured grids
more » ... ch may be static, undergoing rigid or deforming motions, or any combination thereof. General parent-child motions are also accommodated, and the accuracy of the implementation is established using an independent verification based on a complex-variable approach. The methodology is used to demonstrate aerodynamic optimizations of a wind turbine geometry, a biologically-inspired flapping wing, and a complex helicopter configuration subject to trimming constraints. The objective function for each problem is successfully reduced and all specified constraints are satisfied.
doi:10.2514/6.2012-554 fatcat:ufil6gyy4jfzjeodshwqxskapm