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A new non-linear vortex lattice method : applications to wing aerodynamic optimizations

Sugar-Gabor, O; Koreanschi, A; Botez, RM

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Authors

A Koreanschi

RM Botez



Abstract

This paper presents a new non-linear formulation of the classical Vortex Lattice Method (VLM) approach for calculating the aerodynamic properties of lifting surfaces. The method accounts for the effects of viscosity, and due to its low computational cost, it represents a very good tool to perform rapid and accurate wing design and optimization procedures. The mathematical model is constructed by using two-dimensional viscous analyses of the wing span-wise sections, according to strip theory, and then coupling the strip viscous forces with the forces generated by the vortex rings distributed on the wing camber surface, calculated with a fully three-dimensional vortex lifting law. The numerical results obtained with the proposed method are validated with experimental data and show good agreement in predicting both the lift and pitching moment, as well as in predicting the wing drag. The method is applied to modifying the wing of an Unmanned Aerial System to increase its aerodynamic efficiency and to calculate the drag reductions obtained by an upper surface morphing technique for an adaptable regional aircraft wing.

Citation

Sugar-Gabor, O., Koreanschi, A., & Botez, R. (2016). A new non-linear vortex lattice method : applications to wing aerodynamic optimizations. Chinese Journal of Aeronautics, 29(5), 1178-1195. https://doi.org/10.1016/j.cja.2016.08.001

Journal Article Type Article
Acceptance Date Mar 8, 2016
Online Publication Date Aug 27, 2016
Publication Date Aug 27, 2016
Deposit Date Mar 8, 2017
Publicly Available Date Mar 8, 2017
Journal Chinese Journal of Aeronautics
Print ISSN 1000-9361
Publisher Elsevier
Volume 29
Issue 5
Pages 1178-1195
DOI https://doi.org/10.1016/j.cja.2016.08.001
Publisher URL http://dx.doi.org/10.1016/j.cja.2016.08.001
Related Public URLs http://www.sciencedirect.com/science/journal/10009361

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