Critical wake vortex encounter scenarios

Höhne, Gordon; Fuhrmann, Michael; Luckner, Robert

doi:10.1016/j.ast.2004.07.005

Cited by 19 publications

(12 citation statements)

References 4 publications

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“…VESA (Vortex Encounter Severity Assessment) [14,24] is a separate software package developed by Airbus to determine the severity of wake encounters based on six-degrees-offreedom flight simulations. The variables provided to VESA comprise vortex parameters (position, attitude, and strength), configuration and flight attitude of generator and follower aircraft, as well as meteorological data.…”

Section: Vortex Encounter Severity Assessmentmentioning

confidence: 99%

“…The WakeScene (Wake Vortex Scenarios Simulation) Package, which is described in this manuscript, allows to assess the relative encounter probability behind different wake vortex generating aircraft within a domain ranging from the final approach fix to threshold. In cases with potential wake encounters all relevant parameters can be provided to VESA (Vortex Encounter Severity Assessment) [14,24] which may subsequently perform detailed investigations of the severity of the encounter. WakeScene consists of elements that model traffic mix, aircraft trajectories, meteorological conditions, wake vortex evolution, and potential hazard area.…”

Section: Introductionmentioning

confidence: 99%

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Aircraft wake vortex scenarios simulation package – WakeScene

Holzäpfel¹,

Frech²,

Gerz³

et al. 2009

Aerospace Science and Technology

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Section: Vortex Encounter Severity Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aircraft wake vortex scenarios simulation package – WakeScene

Holzäpfel¹,

Frech²,

Gerz³

et al. 2009

Aerospace Science and Technology

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“…40 It performs two basic tasks: i) ILS tracking and ii) compensation of roll axis upsets during the wake encounter. Each encounter simulation starts with the aircraft positioned on the ILS approach path.…”

Section: Pilot Control Modelmentioning

confidence: 99%

Investigation of Encounters with Deformed Wake Vortices using a Monte-Carlo Simulation Methodology

Bieniek

Luckner

2014

6th AIAA Atmospheric and Space Environments Conference

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Flight simulation is an important tool for investigating the impact of a wake-vortex flow field on aircraft response and on the severity of wake vortex encounters as it allows to evaluate a huge variety of encounter parameters under controlled conditions without risk, at low costs and time-efficient. The majority of simulation studies has used a pair of counter-rotating straight vortices to represent the vortex wakes. However, as part of the decay process, the vortices develop a periodic long-wave deformation due to Crow instability that may lead to a breakup into vortex rings. The paper describes a methodology to perform Monte-Carlo simulations of aircraft encounters with such perturbed vortices. A high-fidelity six degree-of-freedom aircraft simulation is coupled with a wake encounter simulation that includes models of wavy vortices and vortex rings, that are fitted to wake shapes from pre-computed large-eddy simulations. Application of the methodology is demonstrated by assessing aircraft bank angle upsets from encounters with straight and deformed vortices for different test setups. First results indicate that the impact of wake deformation is strongly affected by the simulated encounter scenario. For a full-scale Monte-Carlo simulation with uniform parameter distributions and assuming the same and constant vortex strength, vortex rings exhibit a lower probability of experiencing bank angle upsets above a specific threshold, whereas only small differences between straight and wavy vortices are observed.

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“…Several theoretical studies in the open literature can be found which investigated the generation of wake vortex, the behaviour of aircraft that encounter wake vortices and the adverse effects of wake vortex on flight safety (Höhne, Fuhrmann, & Luckner, 2004;Chernyshev, Gaifullin, & Sviridenko, 2014;Huang, Zhang, & Cui, 2017; Aircraft wake vortex state-of-the-art & research needs, 2015). In addition, there are some studies on prevention of wake vortex encounters through an airborne wake vortex prevention system (Aircraft wake vortex state-of-the-art & research needs, 2015; Sölch et al, 2016) and control of aircraft in the event of wake vortex encounter (Schwarz & Hahn, 2011;Yu, & Zhang, 2018).…”

Section: Introductionmentioning

confidence: 99%

Developed Criteria to Improve Pilot Reporting of Airplane Vortex Encounters

Al-Mahadin

Dalkılıç

2020

Aviation

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Leading airplane vortices can be hazardous to following airplanes. The regulated minimum separations between following and leading airplanes are sometimes overjudged, hence causing reduction in the capacity of airports. In other instances, they are underjudged and subsequently causing airplane incidences. A vital contribution to the establishment and adjustment of vortex-related minimum airplane separations rely on the identification of vortex encounters through pilot reporting with a manual analysis of flight data from FDRs (flight data recorders). This current process relies on judgment of both the pilot and the airline analysist. Hence, it is subjective and sometimes lacks the required accuracy. Therefore, it is desirable to set a number of criteria, which can be utilized to evaluate the accuracy of wake vortex encounter identification. These criteria can save time, and are both accurate and simple. This study investigates 54 pilot reports of flight events to establish a set of criteria that enable concerned aviation organizations to confirm airplane vortex encounters with higher accuracy. This also helps airlines and aviation stakeholders to introduce new regulations and enhancements such as pilots and FDR analysts training on vortex identification. Such measures will enhance safety, improve aviation operation efficiency and allow revision of vortex-separation regulations.

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Critical wake vortex encounter scenarios

Cited by 19 publications

References 4 publications

Aircraft wake vortex scenarios simulation package – WakeScene

Aircraft wake vortex scenarios simulation package – WakeScene

Investigation of Encounters with Deformed Wake Vortices using a Monte-Carlo Simulation Methodology

Developed Criteria to Improve Pilot Reporting of Airplane Vortex Encounters

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