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.

Driven cavity simulation of turbomachine blade flows with vortex control

1993 ◽  
Author(s):  
M. ATHAVALE ◽  
A. PRZEKWAS ◽  
R. HENDRICKS
Keyword(s):  
Driven Cavity ◽  
Vortex Control ◽  
Turbomachine Blade

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

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

Passive Wingtip Vortex Control by Using Tip-Mounted Half Delta Wings in Ground Effect

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Anan Lu ◽  
Tim Lee
Keyword(s):  
Vortex Flow ◽  
Ground Effect ◽  
Tip Vortex ◽  
Secondary Vortex ◽  
Flow Properties ◽  
Delta Wings ◽  
Vortex Control ◽  
Physical Mechanisms ◽  
Induced Drag ◽  
Wingtip Vortex

Abstract The ground effect on the wingtip vortex generated by a rectangular semiwing equipped with tip-mounted regular and reverse half delta wings was investigated experimentally. The passive tip vortex control always led to a reduced lift-induced drag as the ground was approached. In close ground proximity, the presence of the corotating ground vortex (GV) added vorticity to the tip vortex while the counter-rotating secondary vortex (SV) negated its vorticity level. The interaction of the GV and SV with the tip vortex and their impact on the lift-induced drag were discussed. Physical mechanisms responsible for the change in the vortex flow properties in ground effect were also provided.

Vortex Control by an Artificial Muscle Based on the Conducting Polymer

2003 ◽  
Author(s):  
Masaki Fuchiwaki ◽  
Kazuhiro Tanaka ◽  
Shingo Sewa ◽  
Kazuo Onishi
Keyword(s):  
Mechanical Properties ◽  
Flow Control ◽  
Conducting Polymer ◽  
Electrode Potential ◽  
Tensile Force ◽  
Artificial Muscle ◽  
Running Water ◽  
Vortex Control ◽  
Scan Rate ◽  
Static Water

We have proposed the flow control by using an artificial muscle based on the conducting polymer. In order to utilize the artificial muscle for flow control, it is important to clarify the mechanical properties on the artificial muscle based on the conducting polymer. The purpose of this study is to clarify the mechanical properties on artificial muscle and possibility of flow control by using it. We have measured the tensile force generated by artificial muscle in the distilled water. Moreover, we have observed the actuation of artificial muscle based on the conducting polymer in water tunnel. The tensile force of artificial muscle increased as the electrode potential increased. The averaged maximum tensile force did not depend on the scan rate of electrode potential. It depended on the electrode potential and was almost constant. However, the time for reaching maximum tensile force depended on the scan rate. The artificial muscle performed the bending actuation sufficiently not only static water but also running water. Therefore, it can be considered that the artificial muscle will be applied to the actuator for flow control.

Forebody vortex control on an F/A-18 using small, rotatable 'tip-strakes'

1993 ◽  
Author(s):  
CARLOS SUAREZ ◽  
BRIAN KRAMER ◽  
GERALD MALCOLM
Keyword(s):  
Vortex Control
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