Computational Study of Flow Interactions over a Close Coupled Canard-Wing on Fighter

Wibowo, Setyawan Bekti; Sutrisno, Sutrisno; Rohmat, Tri Agung

doi:10.15394/ijaaa.2019.1306

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Many of these numerical computations have been approved by the wind and water tunnels tests. [9][10][11][12] According to the results, the vortex breakdown over the wing in presence of canard occurs farther from the wing trailing edge than that for an isolated wing.…”

Section: Introductionmentioning

confidence: 90%

Effects of canard oscillations on the unsteady flowfield over the wing in supersonic flow

Davari

Soltani

2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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Few studies have been devoted to effects of canard oscillations on the flowfield over the wing in supersonic flow and the associated time lags. In this article, an in-depth experimental study on a closely coupled canard-wing-body configuration in supersonic flow has been undertaken to mark the zone of influence of the oscillatory canard on the wing. Surface pressure measurements have been performed on the wing downstream of canard in both static and oscillatory cases at various wing angles of attack and canard deflection angles as well as the canard oscillation amplitudes and frequencies. The results show that the upwash and downwash flowfields due to an oscillatory canard periodically change the effective angle of attack seen by the wing and have different effects on various regions. In supersonic flow, the pressure rise due to the oblique shock waves causes the primary flow separation and the vortex break down onsets to occur at higher angles of attack, comparing to those in the lower speed regimes. According to the results, the mid-span region on the wing, which is directly in the shadow of the oscillating canard, receives more disturbances. During upstroke, the canard induces a downwash field to the front half of the wing, while in downstroke motion, the front regions of the wing experience upwash flow, giving rise to the effective angle of attack seen by the wing. Among various oscillation parameters, the pitching amplitude was observed to have a strong impact on the time lag in flowfield over the wing.

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Section: Introductionmentioning

confidence: 90%

Effects of canard oscillations on the unsteady flowfield over the wing in supersonic flow

Davari

Soltani

2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Nevertheless, the algorithm application of the Q-criterion algorithm so far has not been mixed with the track of the flowline for the vortex growth, to examine the vortex dynamics of the comprehensive picture. There are many previous studies that explain the effect of canard on the main wing for various configurations using experiments and CFD, but these studies have not been able to explain, significantly, the stall delay in the maximum AoA [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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°.

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Comparison of Aerodynamic Characteristics on Sukhoi SU-33-like and F-35 Lightning II-like Models using Water Tunnel Flow Visualization Technique

Wibowo

Fajar

Naufal

et al. 2019

2019 5th International Conference on Science and Technology (ICST)

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Computational Study of Flow Interactions over a Close Coupled Canard-Wing on Fighter

Cited by 4 publications

References 4 publications

Effects of canard oscillations on the unsteady flowfield over the wing in supersonic flow

Effects of canard oscillations on the unsteady flowfield over the wing in supersonic flow

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

Comparison of Aerodynamic Characteristics on Sukhoi SU-33-like and F-35 Lightning II-like Models using Water Tunnel Flow Visualization Technique

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