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Discrete adjoint design optimization approach for increasing transonic buffet onset angle-of-attack

Publication ,  Conference
Thomas, JP; Dowell, EH
Published in: 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference
January 1, 2015

Presented is a discrete adjoint method for transonic buffet design optimization. The method is based on a frequency do-main approach for modeling unsteady aerodynamics. Automatic differentiation is used to derive the computer code representing the adjoint gradient unsteady frequency domain solver. The gradient information is then used to optimize the geometric design in order to minimize unsteady aerodynamic response near the buffet onset boundary. The methodology is demonstrated for a NACA 0012 airfoil transonic buffet configuration. Preliminary analysis indicates that design modification can be done to increase buffet onset angle-of-attack by around one degree for a flow condition where the buffet onset angle-of-attack for the nominal design is roughly three degrees, and that it is possible to do this while maintaining the symmetry of airfoil and not greatly altering the overall airfoil thickness.

Duke Scholars

Published In

16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference

DOI

ISBN

9781624103681

Publication Date

January 1, 2015
 

Citation

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Thomas, J. P., & Dowell, E. H. (2015). Discrete adjoint design optimization approach for increasing transonic buffet onset angle-of-attack. In 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. https://doi.org/10.2514/6.2015-3435
Thomas, J. P., and E. H. Dowell. “Discrete adjoint design optimization approach for increasing transonic buffet onset angle-of-attack.” In 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2015. https://doi.org/10.2514/6.2015-3435.
Thomas JP, Dowell EH. Discrete adjoint design optimization approach for increasing transonic buffet onset angle-of-attack. In: 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. 2015.
Thomas, J. P., and E. H. Dowell. “Discrete adjoint design optimization approach for increasing transonic buffet onset angle-of-attack.” 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2015. Scopus, doi:10.2514/6.2015-3435.
Thomas JP, Dowell EH. Discrete adjoint design optimization approach for increasing transonic buffet onset angle-of-attack. 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. 2015.

Published In

16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference

DOI

ISBN

9781624103681

Publication Date

January 1, 2015