Notice of Retraction: Experimental investigation of counter-rotating two vortices in water towing tank

Liu, Yue; Zhang, Zhengfu; Yang, Qi; Bao, Feng

doi:10.1109/icicisys.2010.5658383

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…[12] This method is particularly efficient in the presence of inner vortices with counter-rotating vorticity. [12] In the light of the study of professor Bao [5,[13][14], it seems to be a promising way to control the wake vortex. Fig.3 Four-vortex wake model By using this instability, according to the early studies, the wake vortex has been minimized efficiently.…”

Section: Rayleigh-ludwieg Instabilitymentioning

confidence: 99%

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Experimental Investigation on Aircraft Wake Vortex Control by Spoilers

Liu¹

2015

Proceedings of the 2015 International Conference on Advances in Mechanical Engineering and Industrial Informatics

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The experimental investigation is mainly to seek an effective method to reduce the strength of aircraft wake vortex which would introduce great hazard to the following flight and threaten the flight safety. The research was carried out in a water-towing tank which equipped with a 2-D Particle Image Velocimetry (PIV) system. By using spoilers attached on the airfoil, the Rayleigh-Ludwieg instability of the wake vortex is activated, leading to the dissipation of the wake vortex in advance. The analysis results given by the PIV system showed that the circulation of the wake vortex was reduced to nearly 40%, as early as in 30 wingspans downstream with suitable settings, instead of more than 100 wingspans for that of a "clean model". The result could provide reference for designing the low wake vortex airfoils.

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Section: Rayleigh-ludwieg Instabilitymentioning

confidence: 99%

“…[2,3,4] They established safe separations between two airplanes so that the follower aircraft must maintain a safe distance from a landing aircraft up ahead of them. [5]But these standard separations have strongly limited the capacity of many airports and cause the congestion of air traffic, showed in Fig.1.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Aircraft Wake Vortex Control by Spoilers

Liu¹

2015

Proceedings of the 2015 International Conference on Advances in Mechanical Engineering and Industrial Informatics

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“…This method is particularly efficient in the presence of inner vortices with counter-rotating vorticity [10]. With respect to the study of Bao [5,11], it seems to be a promising way to control the wake vortex.…”

Section: Fig 1 Four-vortex Wake Modelmentioning

confidence: 99%

“…In order to avoid a hazardous impact of these vortices, the Federal Aviation Administration (FAA) of the USA and the International Civil Aviation Organization (ICAO) have attached great importance to the wake vortex [2,3,4]. They issued regulations of safe separation distances between two airplanes so that the following aircraft would maintain a safe margin from the aircraft ahead [5]. But these standard separations have strongly limited the capacity of many airports and cause the congestion of air traffic.…”

Section: Introductionmentioning

confidence: 99%

Wake Vortex Control Using Modified Flaps

Yang

Bao

2013

AMM

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The present paper is on the experimental investigation of a potentially effective method to alleviate the strength of aircraft wake vortex. The research work was carried out in a water-towing tank which equipped with a 2-D PIV system. By using modified flaps attached to the baseline-airfoil, the Rayleigh-Ludwieg instability of the wake vortex was activated, resulting in a premature dissipation of the wake vortex. The experimental results of PIV measurement exhibited that the circulation of the wake vortex was reduced to over 50% for the optimal case at 45 wingspans downstream with suitable settings, which proved the effectiveness of the modified-flap treatment in alleviating the wake vortex under labor conditions.

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“…[5] The effectiveness of this method in weakening wake vortex was further tested by some fundamental studies. [6,7,8]…”

Section: Introductionmentioning

confidence: 99%

The Instability of a Four-Vortex Wake System in a Water Towing Tank

Yang

Bao

2013

AMR

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A simplified rectangular baseline-airfoil model attached with tailored flaps was designed to study the Rayleigh-Ludwieg instability by tailoring a four-vortex wake system. By means of PIV measurement in a water towing tank, the interaction process and circulation evolution of the wake system were obtained systematically. The circulation remains was reduced to ca. 40% after 43 wingspans which proved the application potentials of this method in alleviating the wake vortex.

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Notice of Retraction: Experimental investigation of counter-rotating two vortices in water towing tank

Cited by 3 publications

References 7 publications

Experimental Investigation on Aircraft Wake Vortex Control by Spoilers

Experimental Investigation on Aircraft Wake Vortex Control by Spoilers

Wake Vortex Control Using Modified Flaps

The Instability of a Four-Vortex Wake System in a Water Towing Tank

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