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Design efficiency evaluation for transonic airfoil optimization - A case for Navier-Stokes designA constrained-optimization design method which improves the aerodynamic performance of transonic airfoils is evaluated from a design-quality and design-efficiency viewpoint. Design efficiency is a measure of the performance improvement and the design time (CPU time). Total-airfoil design and upper-surface design are performed using the Euler and Navier-Stokes equations with several grids, and are evaluated using the Navier-Stokes equations to determine the anticipated physical design response. Even though the cost of the Euler design is lower than Navier-Stokes design, the Navier-Stokes evaluation indicates that the Euler design does not necessarily improve the aerodynamic performance. Therefore, the design optimization should be based on an accurate flow simulation to achieve an actual performance improvement, and the design time is a secondary concern.
Document ID
19930064285
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hager, J. O.
(NASA Ames Research Center Moffett Field, CA, United States)
Eyi, S.
(NASA Ames Research Center Moffett Field, CA, United States)
Lee, K. D.
(Illinois Univ. Urbana, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 93-3112
Meeting Information
Meeting: AIAA, Fluid Dynamics Conference
Location: Orlando, FL
Country: United States
Start Date: July 6, 1993
End Date: July 9, 1993
Sponsors: AIAA
Accession Number
93A48282
Funding Number(s)
CONTRACT_GRANT: NCA2-742
Distribution Limits
Public
Copyright
Other

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