Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge Vortices
Numerical simulations of an 80-degree delta wing in free-to-roll motion are performed by applying the dynamic fluid–body interaction (DFBI) model and the overlap/chimera method using the URANS equations. The capabilities of modern computational fluid dynamics methods for predicting wing-rock phenome...
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MDPI AG
2025-02-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/12/3/197 |
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| author | Mohamed Sereez Mikhail Goman Nikolay Abramov Caroline Lambert |
| author_facet | Mohamed Sereez Mikhail Goman Nikolay Abramov Caroline Lambert |
| author_sort | Mohamed Sereez |
| collection | DOAJ |
| description | Numerical simulations of an 80-degree delta wing in free-to-roll motion are performed by applying the dynamic fluid–body interaction (DFBI) model and the overlap/chimera method using the URANS equations. The capabilities of modern computational fluid dynamics methods for predicting wing-rock phenomena over a wide range of angles of attack at low Mach numbers and strong wing–vortex interaction, including the vortex breakdown phenomenon, were investigated by comparing simulation results with wind tunnel test data. At low angles of attack, delays in the strength and position of the leading-edge vortices above the wing have a destabilizing effect on it, leading to the emergence of self-sustained limit-cycle oscillations. At high angles of attack, where vortex breakdown occurs, the available wind tunnel data show that there are two modes of wing self-oscillations in free-to-roll motion, namely, regular large-amplitude oscillations and irregular small-amplitude oscillations, where the excitation of the latter mode depends on the angle of attack and the initial roll angle of the wing motion. The performed numerical simulation also shows the existence of these two self-oscillatory modes in roll, qualitatively and quantitatively matching the experimental data. |
| format | Article |
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| institution | OA Journals |
| issn | 2226-4310 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
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| series | Aerospace |
| spelling | doaj-art-bfdfafbc577e4cd885f1fa4f69386ee72025-08-20T02:11:00ZengMDPI AGAerospace2226-43102025-02-0112319710.3390/aerospace12030197Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge VorticesMohamed Sereez0Mikhail Goman1Nikolay Abramov2Caroline Lambert3Faculty of Computing, Engineering and Media, De Montfort University, Leicester LE1 9BH, UKFaculty of Computing, Engineering and Media, De Montfort University, Leicester LE1 9BH, UKFaculty of Computing, Engineering and Media, De Montfort University, Leicester LE1 9BH, UKFuture Transport Engineering, Coventry University, Coventry CV1 5FB, UKNumerical simulations of an 80-degree delta wing in free-to-roll motion are performed by applying the dynamic fluid–body interaction (DFBI) model and the overlap/chimera method using the URANS equations. The capabilities of modern computational fluid dynamics methods for predicting wing-rock phenomena over a wide range of angles of attack at low Mach numbers and strong wing–vortex interaction, including the vortex breakdown phenomenon, were investigated by comparing simulation results with wind tunnel test data. At low angles of attack, delays in the strength and position of the leading-edge vortices above the wing have a destabilizing effect on it, leading to the emergence of self-sustained limit-cycle oscillations. At high angles of attack, where vortex breakdown occurs, the available wind tunnel data show that there are two modes of wing self-oscillations in free-to-roll motion, namely, regular large-amplitude oscillations and irregular small-amplitude oscillations, where the excitation of the latter mode depends on the angle of attack and the initial roll angle of the wing motion. The performed numerical simulation also shows the existence of these two self-oscillatory modes in roll, qualitatively and quantitatively matching the experimental data.https://www.mdpi.com/2226-4310/12/3/197CFD simulationswing–vortex interactionvortex breakdown80-degree delta wing aerodynamicswing-rock motion |
| spellingShingle | Mohamed Sereez Mikhail Goman Nikolay Abramov Caroline Lambert Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge Vortices Aerospace CFD simulations wing–vortex interaction vortex breakdown 80-degree delta wing aerodynamics wing-rock motion |
| title | Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge Vortices |
| title_full | Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge Vortices |
| title_fullStr | Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge Vortices |
| title_full_unstemmed | Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge Vortices |
| title_short | Numerical Simulation of Self-Sustained Roll Oscillations of an 80-Degree Delta Wing Caused by Leading-Edge Vortices |
| title_sort | numerical simulation of self sustained roll oscillations of an 80 degree delta wing caused by leading edge vortices |
| topic | CFD simulations wing–vortex interaction vortex breakdown 80-degree delta wing aerodynamics wing-rock motion |
| url | https://www.mdpi.com/2226-4310/12/3/197 |
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