Fully implicit discrete-adjoint methods for rotorcraft applications

Biava, M., Woodgate, M. and Barakos, G. N. (2016) Fully implicit discrete-adjoint methods for rotorcraft applications. AIAA Journal, 54(2), pp. 735-749. (doi: 10.2514/1.J054006)

Abstract

This paper presents the development of a fully implicit, low-memory discrete-adjoint method by means of automatic source-code differentiation applied to the Helicopter Multi-Block computational fluid dynamics solver. The method is suitable for applications in flight mechanics, as well as shape optimization, and is demonstrated in this paper for popular flow cases reported in the literature. In particular, adjoint computational fluid dynamics computations were undertaken for airfoils, wings, and rotor-blade cases, and the obtained results were found to agree well with published solutions and with finite differences of flow derivatives. The method has been demonstrated for inviscid and viscous cases, and the results suggest that the current implementation is robust and efficient. The cost of the adjoint computations is relatively low due to the employed source-code differentiation, and most of the time, it is no more than the cost of a steady-state flow solution.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Barakos, Professor George and Woodgate, Dr Mark and Biava, Dr Massimo
• Authors: Biava, M., Woodgate, M., and Barakos, G. N.
• College/School: College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
• Journal Name: AIAA Journal
• Publisher: American Institute of Aeronautics and Astronautics, Inc.
• ISSN: 0001-1452
• ISSN (Online): 1533-385X
• Copyright Holders: Copyright © 2015 American Institute of Aeronautics and Astronautics, Inc.
• First Published: First published in AIAA Journal 54(2):735-749
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher.