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°.
Highlights
Various efforts have always been made to improve the ability of a fighter
This study focuses on observing the effect of canard deflection angles and fuselage variations on aerodynamic performance and vortex dynamics in fighter models, similar to the Sukhoi Su-30-like using computational fluid dynamics (CFD) simulation and GAMA water tunnel
We studied the effects of canard deflection angle application on the aerodynamic performance of combat aircraft
Summary
A critical fighter capability is to make maneuvering movements at high angles of attack (AoA) and using small rotation angles. The aerodynamic design of an aircraft has continued to progress since its introduction in the 1920s. Previous research activities on aircraft strategies aiming to reduce drag usually focus on wing design, lift surface forces, and especially on airfoil design. At high-speed conditions, precise aircraft design is significant to reduce the total drag of an aircraft and improve flight performance [1]. Airplane performance, such as maximum flight speed or fuel consumption, can be improved with better aerodynamic design [2,3]
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