NDLI: Discrete adjoint-based design for unsteady turbulent flows on dynamic overset unstructured grids

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Discrete adjoint-based design for unsteady turbulent flows on dynamic overset unstructured grids

Content Provider	NASA Technical Reports Server (NTRS)
Author	Diskin Sr., Boris Nielsen, Eric J.
Copyright Year	2012
Description	A discrete adjoint-based design methodology for unsteady turbulent flows on three-dimensional 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 which 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.
File Size	5836720
Page Count	37
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120001339
Archival Resource Key	ark:/13960/t50g8nq1s
Language	English
Publisher Date	2012-01-09
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Thermodynamics Incompressible Flow Turbulent Flow Three Dimensional Flow Iterative Solution H-60 Helicopter Unstructured Grids Mathematics Adjoints Unsteady Flow Discrete Functions Compressible Flow Optimization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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