Aircraft Vortex Wake and Flight Safety Problems

Bobylev, A. V.; Vyshinsky, V.; Soudakov, G. G.; Yaroshevsky, Vassiliy A.

doi:10.2514/1.46432

Cited by 20 publications

(10 citation statements)

References 8 publications

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“…Near-Earth aircraft wake vortices emerge as a by-product of the lift generated by aircraft on approach and departure. In dense and busy airport airspace, the trailing wake of the aircraft in front can have a serious impact on the safety of the aircraft behind [1]. To prevent the wake from colliding with the aircraft, the International Civil Aviation Organisation (ICAO) developed standards for wake spacing in the 1970s.…”

Section: Introductionmentioning

confidence: 99%

Conv-Wake: A Lightweight Framework for Aircraft Wake Recognition

Pan

Leng

et al. 2022

Journal of Sensors

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The recognition of aircraft wake vortex can provide an indicator of early warning for civil aviation transportation safety. In this paper, several wake vortex recognition models based on deep learning and traditional machine learning were presented. Nonetheless, these models are not completely suitable owing to their dependence on the visualization of LiDAR data that yields the information loss of in reconstructing the behavior patterns of wake vortex. To tackle this problem, we proposed a lightweight deep learning framework to recognize aircraft wake vortex in the wind field of Shenzhen Baoan Airport’s arrival and departure routes. The nature of the introduced model is geared towards three aspects. First, the dilation patch embedding module is used as the input representation of the framework, attaining additional rich semantics information over long distances while maintaining parameters. Second, we combined a separable convolution module with a hybrid attention mechanism, increasing the model’s attention to the space position of wake vortex core. Third, environmental factors that affect the vortex behavior of the aircraft’s wake were encoded into the model. Experiments were conducted on a Doppler LiDAR acquisition dataset to validate the effectiveness of the proposed model. The results show that the proposed network has an accuracy of 0.9963 and a recognition speed at 100 frames per second was achieved on an experimental device with 0.51 M parameters.

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Section: Introductionmentioning

confidence: 99%

Conv-Wake: A Lightweight Framework for Aircraft Wake Recognition

Pan

Leng

et al. 2022

Journal of Sensors

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“…He caught in a vortex structure undergoes significant changes in aerodynamic forces and moments, which is especially dangerous near the ground. Getting into the CVS can lead to engine stalling, asymmetric stall on the wing and entry into a spin [1]. Ignorance of the state and behavior of the atmosphere over mountainous terrain and the unavailability of pilots to fly in conditions of orographic turbulence (ORT) can lead to flight accidents and disasters.…”

Section: Introductionmentioning

confidence: 99%

Study of aerodynamic characteristics of an aircraft during approach to landing in a disturbed atmosphere

Vyshinsky

Chinh

2022

Vietnam J. Mech.

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An approximate method is proposed for determining the aerodynamic effect of coherent vortex structures (CVS) of atmospheric turbulence on an aircraft. As a source of the CVS the vortex wind wakes arising when the atmospheric wind flows around the mountain massif of the Son Tra peninsula, located near the Da Nang airport, and the vortex wake behind the Su-27 type aircraft in the landing configuration are considered. Modeling the formation of a vortex structure is carried out by the grid method within the framework of the boundary value problem for the Reynolds-averaged Navier—Stokes equations. The evolution and stochastics of the far wake are modeled in a two-dimensional approximation by discrete Rankine vortices. The assessment of the increment of forces and moments from the effect of the vortex system on the aircraft was carried out within the framework of the panel method. The situation is considered when a light transport aircraft gets into a vortex wake behind an aircraft with a swept wing and a passenger aircraft of the MS-21 type, approaching for landing at the CVS from a mountainous terrain.

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“…This will be serious when a smaller aircraft follows a bigger one. Bobylev2010 [1] has presented the calculations of the wake characteristics for certain aircrafts and safe distance values during landing with various turbulent atmospheric states.…”

Section: Introductionmentioning

confidence: 99%

Experiment on Wingtip Vortices using a Half Deltawing at the Tips

2019

IJRTE

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The counter rotating wing tip vortices produced by the aircraft continues to be a big concern for the aviation industry and the aircraft manufacturers due to its hazardous effects on the flight safety and aircraft efficiency. The strength of the vortices poses severe problems to the aircraft operations. Manufacturers developed various wingtip devices to alleviate this problem, but still it is not fully understood and solved. In this thesis, the effectiveness of using a half delta wing at the tips is investigated. The flow field over a low aspect ratio NACA 0015 wing fitted with a slender sharp half delta wing with a leading edge sweep angle 700 at a Reynolds number 1.87 ×105 is investigated. Particle image velocimetry is used to quantify the vortex structure and force balance measurements are used to calculate the aerodynamic data of the wing. The peak vorticity, peak tangential velocity are decreased due to the addition of half delta wing. The over-all radius of the wingtip vortex increased showing a diffused vortex due to the addition of the half delta wing. The core circulation is decreased leading to a lower strength vortex. Though the tip device increased the drag, it increases the aerodynamic efficiency through the improvement in L/D.

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Aircraft Vortex Wake and Flight Safety Problems

Cited by 20 publications

References 8 publications

Conv-Wake: A Lightweight Framework for Aircraft Wake Recognition

Conv-Wake: A Lightweight Framework for Aircraft Wake Recognition

Study of aerodynamic characteristics of an aircraft during approach to landing in a disturbed atmosphere

Experiment on Wingtip Vortices using a Half Deltawing at the Tips

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