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

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 chan...

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Bibliographic Details
Published in:Aerospace 2019-02, Vol.6 (2), p.12
Main Authors: Sutrisno, Rohmat, Tri Agung, Wibowo, Setyawan Bekti, Iswahyudi, Sigit
Format: Article
Language:English
Subjects:
Aerodynamics
Air flow
Aircraft
Algorithms
Angle of attack
Canard configurations
canard deflection angle
Computational fluid dynamics
Deflection
Delay
Dogfighting
Feasibility studies
Flow distribution
Flow pattern
Fluid dynamics
Fluid flow
high AoA
Hydrodynamics
Maneuverability
Mathematical models
most robust interaction
Q-criterion
Research methodology
reveal flow phenomenon
stall delay
Stalling
Sukhoi aircraft
Vortex dynamics
Vortices
water tunnel
Wings (aircraft)
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Summary: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°.
ISSN:2226-4310
2226-4310
DOI:10.3390/aerospace6020012