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An optimisation of a chordwise slot to enhance lateral flow control on a UCAV (2022)
Journal Article
Ali, U., Chadwick, E., & Sugar-Gabor, O. (2022). An optimisation of a chordwise slot to enhance lateral flow control on a UCAV. Incas Bulletin, 14(4), 3-17. https://doi.org/10.13111/2066-8201.2022.14.4.1

This research aims to optimise a chordwise slot so that lateral flow control of a flying wing configuration can be enhanced. This was achieved by maximising the airflow rate over the trailing edge control surfaces of the wing. A higher rate of airf... Read More about An optimisation of a chordwise slot to enhance lateral flow control on a UCAV.

Non-intrusive reduced-order model for unsteady fluid flow and fluid-structure interaction problems (2022)
Presentation / Conference
Sugar-Gabor, O., & Fairchild, D. (2022, October). Non-intrusive reduced-order model for unsteady fluid flow and fluid-structure interaction problems. Presented at International Conference of Aerospace Sciences AEROSPATIAL 2022, INCAS, Bucharest, Romania

A non-intrusive reduced-order model applicable to time-dependent parametric systems is developed. The model is based on extracting a reduced-order basis from high-order snapshots via proper orthogonal decomposition. Multi-layered feedforward artifi... Read More about Non-intrusive reduced-order model for unsteady fluid flow and fluid-structure interaction problems.

Active flux scheme for time-dependent, viscous, compressible flows (2022)
Presentation / Conference
Sugar-Gabor, O. (2022, October). Active flux scheme for time-dependent, viscous, compressible flows. Presented at International Conference of Aerospace Sciences AEROSPATIAL 2022, INCAS, Bucharest, Romania

The Active Flux scheme is a Finite Volume scheme with additional degrees of freedom on the cell boundaries. These additional nodes allow for third-order accuracy to be achieved, though extensions to higher orders are also possible. Unlike Godunov-t... Read More about Active flux scheme for time-dependent, viscous, compressible flows.

Reduced-order modelling of parameterised incompressible and compressible unsteady flow problems using deep neural networks (2021)
Journal Article
Sugar-Gabor, O. (2021). Reduced-order modelling of parameterised incompressible and compressible unsteady flow problems using deep neural networks. International Journal of Computer Applications in Technology, 66(1), 36-50. https://doi.org/10.1504/IJCAT.2021.119603

A non-intrusive reduced-order model for nonlinear parametric flow problems is developed. It is based on extracting a reduced-order basis from full-order snapshots via proper orthogonal decomposition and using both deep and shallow neural network a... Read More about Reduced-order modelling of parameterised incompressible and compressible unsteady flow problems using deep neural networks.

Fast and accurate quasi-3D aerodynamic methods for aircraft conceptual design studies (2020)
Journal Article
Sugar-Gabor, O., & Koreanschi, A. (2021). Fast and accurate quasi-3D aerodynamic methods for aircraft conceptual design studies. Aeronautical Journal, 125(1286), 593-617. https://doi.org/10.1017/aer.2020.128

In this paper, recent developments in quasi-3D aerodynamic methods are presented. At their core, these methods are based on the Lifting-Line Theory and Vortex Lattice Method, but with a relaxed set of hypotheses, while also considering the effect o... Read More about Fast and accurate quasi-3D aerodynamic methods for aircraft conceptual design studies.

Numerical investigation of the effect of tread pattern on rotating wheel aerodynamics (2020)
Journal Article
Soliman, M., El-Baz, A., Abdel-Aziz, M., Abdel-Aziz, N., & Sugar-Gabor, O. (2020). Numerical investigation of the effect of tread pattern on rotating wheel aerodynamics. International journal of automotive and mechanical engineering (Kuantan), 17(4), 8234-8245. https://doi.org/10.15282/IJAME.17.4.2020.01.0621

The present work investigates the dynamic effect of wheel rotation on the aerodynamic characteristics of slick type (ST) wheel of Formula One racing cars using a computational approach. The ST wheel model was compared to experimental results as a val... Read More about Numerical investigation of the effect of tread pattern on rotating wheel aerodynamics.

Parameterised non-intrusive reduced-order model for general unsteady flow problems using artificial neural networks (2020)
Journal Article
Sugar-Gabor, O. (2021). Parameterised non-intrusive reduced-order model for general unsteady flow problems using artificial neural networks. International Journal for Numerical Methods in Fluids, 93(5), 1309-1331. https://doi.org/10.1002/fld.4930

A non-intrusive reduced-order model for nonlinear parametric flow problems is developed. It is based on extracting a reduced-order basis from high-order snapshots via proper orthogonal decomposition and using multi-layered feedforward artificial ne... Read More about Parameterised non-intrusive reduced-order model for general unsteady flow problems using artificial neural networks.

Design of supercritical low-Reynolds number airfoils for fixed-wing flight on Mars (2020)
Journal Article
Sugar-Gabor, O., & Koreanschi, A. (2020). Design of supercritical low-Reynolds number airfoils for fixed-wing flight on Mars. Journal of Aerospace Engineering, 33(5), https://doi.org/10.1061/%28ASCE%29AS.1943-5525.0001166

Aerodynamic shape optimization for the high-subsonic low-Reynolds number flow regime represents an area of on-going research. The interaction between supercritical compressible flow and laminar boundary layer separation is not well understood due to... Read More about Design of supercritical low-Reynolds number airfoils for fixed-wing flight on Mars.

Nonlinear lifting-line model using a vector formulation of the unsteady Kutta-Joukowski theorem (2018)
Presentation / Conference
Sugar-Gabor, O. (2018, October). Nonlinear lifting-line model using a vector formulation of the unsteady Kutta-Joukowski theorem. Presented at Aerospatial 2018 : International Conference of Aerospace Sciences, Bucharest, Romania

In this paper, a vector form of the unsteady Kutta-Joukowski theorem is derived and then used in the formulation of a general Lifting-Line Model capable of analysing a wide range of engineering problems of interest. The model is applicable to investi... Read More about Nonlinear lifting-line model using a vector formulation of the unsteady Kutta-Joukowski theorem.

A general numerical unsteady nonlinear lifting line model for engineering aerodynamics studies (2018)
Journal Article
Sugar-Gabor, O. (2018). A general numerical unsteady nonlinear lifting line model for engineering aerodynamics studies. Aeronautical Journal, 122(1254), 1199-1228. https://doi.org/10.1017/aer.2018.57

The lifting line theory is widely used for obtaining aerodynamic performance results in various engineering fields, from aircraft conceptual design to wind power generation. Many different models were proposed, each tailored for a specific purpose, t... Read More about A general numerical unsteady nonlinear lifting line model for engineering aerodynamics studies.

Unsteady nonlinear lifting line model for applied aerodynamics studies (2018)
Presentation / Conference
Sugar-Gabor, O. (2018, May). Unsteady nonlinear lifting line model for applied aerodynamics studies. Presented at Advances in Aerospace Structures, Systems and Technology (AASST 2018), London, UK

The lifting line theory is widely used for obtaining aerodynamic performance results in various engineering fields, from aircraft conceptual design to wind power generation. Many different models were proposed, each tailored for a specific purpose, t... Read More about Unsteady nonlinear lifting line model for applied aerodynamics studies.

Numerical and experimental transition results evaluation for a morphing wing and aileron system (2018)
Journal Article
Botez, R., Koreanschi, A., Sugar-Gabor, O., Mebarki, Y., Mamou, M., Tondji, Y., …Concilio, A. (2018). Numerical and experimental transition results evaluation for a morphing wing and aileron system. Aeronautical Journal, 122(1251), 747-784. https://doi.org/10.1017/aer.2018.15

A new wing-tip concept with morphing upper surface and interchangeable conventional and morphing ailerons was designed, manufactured, bench and wind tunnel tested. The development of this wing tip model was performed in the frame of an international... Read More about Numerical and experimental transition results evaluation for a morphing wing and aileron system.

Numerical study of the circular cylinder in supersonic ground effect conditions (2018)
Journal Article
Sugar-Gabor, O. (2018). Numerical study of the circular cylinder in supersonic ground effect conditions. International review of aerospace engineering (CD-ROM), 11(1), https://doi.org/10.15866/irease.v11i1.13696

A numerical study of the aerodynamics of a circular cylinder section in proximity to the ground surface was performed, for Mach numbers of 1.5 and 2.9 and ground clearances between 2 and 0.125, non-dimensional with respect to the cylinder diameter. T... Read More about Numerical study of the circular cylinder in supersonic ground effect conditions.

Discrete adjoint-based simultaneous analysis and design approach for conceptual aerodynamic optimization (2017)
Journal Article
Sugar-Gabor, O. (2017). Discrete adjoint-based simultaneous analysis and design approach for conceptual aerodynamic optimization. Incas Bulletin, 9(3), 133-147. https://doi.org/10.13111/2066-8201.2017.9.3.11

In this paper, a simultaneous analysis and design method is derived and applied for a non-linear constrained aerodynamic optimization problem. The method is based on the approach of defining a Lagrange functional based on the objective function and t... Read More about Discrete adjoint-based simultaneous analysis and design approach for conceptual aerodynamic optimization.

Morphing wing application on Hydra Technologies UAS-S4 (2017)
Presentation / Conference
Segui, M., Sugar-Gabor, O., Koreanschi, A., & Botez, R. (2017, February). Morphing wing application on Hydra Technologies UAS-S4. Presented at IASTED Modelling, Identification and Control 2017 Conference, Innsbruck, Austria

This paper presents the aerodynamic results of a morphing wing study performed on the UAS S4 Éhecatl from Hydra Technologies. Only the cruise phase of the aircraft was considered (constant altitude and constant speed). The difference, from an aerodyn... Read More about Morphing wing application on Hydra Technologies UAS-S4.

New methodology for longitudinal flight dynamics modelling of the UAS-S4 Ehecatl towards its aerodynamics estimation modelling (2017)
Presentation / Conference
Kuitche, M., Segui, M., Botez, R., Sugar-Gabor, O., & Ghazi, G. (2017, January). New methodology for longitudinal flight dynamics modelling of the UAS-S4 Ehecatl towards its aerodynamics estimation modelling. Presented at AIAA Modeling and Simulation Technologies Conference, AIAA SciTech Forum 2017, Grapevine, Texas, USA

Unmanned Aerial Vehicle modelling has found diverse utilities in both civil and military applications. In order to develop an accurate model of their flight dynamics, it is important to properly estimate their aerodynamics coefficients. For this pu... Read More about New methodology for longitudinal flight dynamics modelling of the UAS-S4 Ehecatl towards its aerodynamics estimation modelling.

Optimization and design of an aircraft’s morphing wing-tip demonstrator for drag reduction at low speed, Part I – Aerodynamic optimization using genetic, bee colony and gradient descent algorithms (2017)
Journal Article
Koreanschi, A., Sugar-Gabor, O., Acotto, J., Brianchon, G., Portier, G., Botez, R., …Mebarki, Y. (2017). Optimization and design of an aircraft’s morphing wing-tip demonstrator for drag reduction at low speed, Part I – Aerodynamic optimization using genetic, bee colony and gradient descent algorithms. Chinese Journal of Aeronautics, 30(1), 149-163. https://doi.org/10.1016/j.cja.2016.12.013

In this paper, an ‘in-house’ genetic algorithm is described and applied to an optimization problem for improving the aerodynamic performances of an aircraft wing tip through upper surface morphing. The algorithm’s performances were studied from the c... Read More about Optimization and design of an aircraft’s morphing wing-tip demonstrator for drag reduction at low speed, Part I – Aerodynamic optimization using genetic, bee colony and gradient descent algorithms.