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Aerodynamic Design on Unstructured Grids for Turbulent FlowsAn aerodynamic design algorithm for turbulent flows using unstructured grids is described. The current approach uses adjoint (costate) variables for obtaining derivatives of the cost function. The solution of the adjoint equations is obtained using an implicit formulation in which the turbulence model is fully coupled with the flow equations when solving for the costate variables. The accuracy of the derivatives is demonstrated by comparison with finite-difference gradients and a few example computations are shown. In addition, a user interface is described which significantly reduces the time required for setting up the design problems. Recommendations on directions of further research into the Navier Stokes design process are made.
Document ID
19970031958
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Anderson, W. Kyle (NASA Langley Research Center Hampton, VA United States)
Bonhaus, Daryl L. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1997
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.15:112867
NASA-TM-112867
Accession Number
97N29027
Funding Number(s)
PROJECT: RTOP 522-31-21-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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