Qin, N., Coppin, J. and Birch, T. (2013) Adjoint Based Aerodynamic Optimisation of a UCAV. In: 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. 51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 07-10 Jan 2013, Grapevine, Dallas/Ft. Worth Region, Texas (USA). AIAA 2013-0146 . American Institute of Aeronautics and Astronautics .
Abstract
An optimisation study for the 1303 UCAV has been co nducted attempting to minimise drag in the cruise configuration subject to constra ints designed to avoid flow separation at take"off. The methodology has been developed for pr oducing credible designs for this class of wing early in the design process and hence minim ising assumptions made during aircraft preliminary design. The design is achieved iterativ ely using a gradient based SQP optimiser where the objective is calculated using an in house multiblock CFD code MERLIN in Euler mode. The objective gradients are efficiently calcu lated using an in house discrete adjoint code adj"MERLIN. The high lift constraint is based on a quasi"vortex"lattice method with empirical relationships which place limits on the ‘ attainable’ leading edge thrust aiming to avoid flow separation. The resulting designs are an alysed using MERLIN in RANS mode with the k"ω turbulence model which shows that desi gns can be obtained with similar cruise drag to the original planar wing but with considera bly improved high lift performance.
Metadata
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| Copyright, Publisher and Additional Information: | Copyright © 2013 by J. Coppin, N. Qin and T. Birch. Published by the American Institute of Aeronautics and Astronautics, Inc. This is an author produced version of a paper subsequently published in 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. Uploaded in accordance with the publisher's self-archiving policy. |
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| Institution: | The University of Sheffield |
| Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
| Depositing User: | Symplectic Sheffield |
| Date Deposited: | 09 Oct 2015 13:32 |
| Last Modified: | 19 Dec 2022 13:31 |
| Published Version: | http://arc.aiaa.org/doi/abs/10.2514/6.2013-146 |
| Status: | Published |
| Publisher: | American Institute of Aeronautics and Astronautics |
| Series Name: | AIAA 2013-0146 |
| Identification Number: | https://doi.org/10.2514/6.2013-146 |
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