VORTEX CONTROL FOR TAIL BUFFET ALLEVIATION ON A TWIN-TAIL FIGHTER CONFIGURATION

1989 ◽  
Author(s):  
Dhanvada M. Rao ◽  
C. K. Puram ◽  
Gautam H. Shah
Keyword(s):  
Vortex Control ◽  
Tail Buffet

Liutex-based vortex control with implications for cavitation suppression

2021 ◽  
Vol 33 (1) ◽  
pp. 74-85
Author(s):  
Yi-qian Wang ◽  
Hai-dong Yu ◽  
Wei-wen Zhao ◽  
De-cheng Wan
Keyword(s):  
Vortex Control

Wing tip vortex control using synthetic jets

2006 ◽  
Vol 110 (1112) ◽  
pp. 673-681 ◽  
Author(s):  
P. Margaris ◽  
I. Gursul
Keyword(s):  
Synthetic Jet ◽  
Synthetic Jets ◽  
Tip Vortex ◽  
Particle Image Velocimetry System ◽  
Driving Frequency ◽  
Velocity Measurements ◽  
Vortex Control ◽  
Image Velocimetry ◽  
Wing Tip ◽  
Jet Blowing

AbstractAn experimental investigation was conducted to study the effect of synthetic jet (oscillatory, zero net mass flow jet) blowing near the wing tip, as a means of diffusing the trailing vortex. Velocity measurements were taken, using a Particle Image Velocimetry system, around the tip and in the near wake of a rectangular wing, which was equipped with several blowing slots. The effect of the synthetic jet was compared to that of a continuous jet blowing from the same configurations. The results show that the use of synthetic jet blowing is generally beneficial in diffusing the trailing vortex and comparable to the use of continuous jet. The effect was more pronounced for the highest blowing coefficient used. The driving frequency of the jet did not generally prove to be a significant parameter. Finally, the instantaneous and the phase-locked velocity measurements helped explain the different mechanisms employed by the continuous and synthetic jets in diffusing the trailing vortex.

Vortex control over sharp-edged slender bodies

1995 ◽  
Vol 32 (4) ◽  
pp. 739-745 ◽  
Author(s):  
D. Gangulee ◽  
T. Terry Ng
Keyword(s):  
Vortex Control ◽  
Slender Bodies

Vortex Control

1971 ◽  
pp. 137-155 ◽  
Author(s):  
M. T. Landahl ◽  
S. E. Widnall
Keyword(s):  
Vortex Control

scholarly journals Prediction of Vertical Tail Buffet Using CFD/CSD Coupling Method

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Bing Han ◽  
Min Xu
Keyword(s):  
Vortex Breakdown ◽  
Peak Frequency ◽  
Basis Functions ◽  
Resonance Phenomenon ◽  
Structural Dynamic ◽  
Flexible Tail ◽  
Bending Mode ◽  
Tail Structure ◽  
Tail Buffet ◽  
Modal Coordinates

The vertical tail buffet induced by the vortex breakdown flow is numerically investigated. The unsteady flow is calculated by solving the RANS equations. The structural dynamic equations are decoupled in the modal coordinates. The radial basis functions (RBFs) are employed to generate the deformation mesh. The buffet response of the flexible tail is predicted by coupling the three sets of equations. The results show that the presence of asymmetry flow on the inner and outer surface of the tail forced the structural deflection offsetting the outboard. The frequency of the 2nd bending mode of the tail structure meets the peak frequency of the pressure fluctuation upon the tail surface, and the resonance phenomenon was observed. Therefore, the 2nd bending responses govern the flow field surrounding the vertical tail. Finally, the displacement of the vertical tail is small, while the acceleration with a large quantitation forces the vertical tail undergoing severe addition inertial loads.

Resolution of Tail Buffet Phenomena for AH-64D™ Longbow Apache™

1999 ◽  
Vol 44 (1) ◽  
pp. 16-25 ◽  
Author(s):  
Ahmed A. Hassan ◽  
Thomas Thompson ◽  
Earl P. N. Duque ◽  
John Melton
Keyword(s):  
Tail Buffet

Computation of F/A-18 tail buffet

1996 ◽  
Vol 33 (6) ◽  
pp. 1181-1189 ◽  
Author(s):  
Ken Gee ◽  
Scott M. Murman ◽  
Lewis B. Schiff
Keyword(s):  
Tail Buffet
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