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Vortex Dynamics Study of the Canard Deflection Angles’ Influence on the Sukhoi Su-30-Like Model to Improve Stall Delays at High AoA

1
Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
2
Department of Mechanical Engineering, Vocational College, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
3
Department of Mechanical Engineering, Universitas Tidar, Magelang 56116, Indonesia
*
Author to whom correspondence should be addressed.
Aerospace 2019, 6(2), 12; https://doi.org/10.3390/aerospace6020012
Received: 19 December 2018 / Revised: 24 January 2019 / Accepted: 30 January 2019 / Published: 1 February 2019
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Abstract

The maneuverability of the Sukhoi Su-30 at very high angles of attack (AoA) was remarkably appealing. Canard angle, in cooperation with aircraft wing, created a flow pattern whereby, in that position, the fighter still had as much lifting force as possible in order not to stall. The behavior of changing canard angle configuration played an essential role in creating the strong vortex core so that it could delay the stall. The study of vortex dynamics at canard deflection angle gave an essential function in revealing the stall delay phenomenon. In this study, one could analyze the flow patterns and vortex dynamics ability of the Sukhoi Su-30-like model to delay stall due to the influence of canard deflection. The used of water tunnel facilities and computational fluid dynamics (CFD) based on Q-criterion has obtained clear and detailed visualization and aerodynamics data in revealing the phenomenon of vortex dynamics. It was found that between 30° and 40° canard deflection configurations, Sukhoi Su-30-like was able to produce the most robust flow interaction from the canard to the main wing. It was clearly seen that the vortex merging formation above the fighter heads was clearly visible capable of delaying stall until AoA 80°. View Full-Text
Keywords: canard deflection angle; Q-criterion; water tunnel; reveal flow phenomenon; most robust interaction; high AoA; stall delay canard deflection angle; Q-criterion; water tunnel; reveal flow phenomenon; most robust interaction; high AoA; stall delay
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sutrisno; Rohmat, T.A.; Wibowo, S.B.; Iswahyudi, S. Vortex Dynamics Study of the Canard Deflection Angles’ Influence on the Sukhoi Su-30-Like Model to Improve Stall Delays at High AoA. Aerospace 2019, 6, 12.

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