Predictions of the low-speed aerodynamic characteristics of generic UCAVs

Aleisa, H., Kontis, K. and Nikbay, M. (2021) Predictions of the low-speed aerodynamic characteristics of generic UCAVs. In: AIAA SCITECH 2022 Forum, San Diego, CA & Virtual, 3-7 January 2022, ISBN 9781624106316 (doi: 10.2514/6.2022-0428)

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At low speeds, the leading-edge sweep angle influences the flight performance of swept wings. The flow behavior of the moderate to highly swept wings is affected by the vortex flow structures, which form at low angles of attack because of leading-edge flow separation. This topic of investigation gained momentum recently due to its application to unmanned combat aerial vehicle (UCAV) configurations that are significantly affected by flow separation at high angles of attack. The present work investigates the flowfield and low-speed aerodynamic characteristics of the generic UCAV models with constant and non-constant leading-edge sweep for a wide range of angles of attack. The open-source computational fluid dynamics (CFD) code OpenFOAM 8.0 was employed for the numerical simulations. The present numerical simulation results matched well with the experimental data in the literature. It was found that the lift and drag characteristics of the UCAV are sensitive to the leading-edge sweep angle, and a non-constant leading-edge sweep angle variant exhibited delayed stall and enhanced aerodynamic performance.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Kontis, Professor Konstantinos
Authors: Aleisa, H., Kontis, K., and Nikbay, M.
College/School:College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
Published Online:29 December 2021
Copyright Holders:Copyright © 2022 by Aleisa, Kontis and Nikbay/ University of Glasgow/ Istanbul Technical University
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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