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Simulation Methods for Aircraft Encounters with Deformed Wake Vortices

机译：具有变形尾流的飞机相遇的仿真方法

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摘要

Simulation of aircraft wake-vortex encounters is regularly applied in the research toward revised aircraft separation minima. Most encounter flight simulation studies have used a pair of straight counter-rotating vortices. However, after being shed by the generating aircraft, the wake vortices begin to develop a growing deformation due to the long-wave Crow instability, especially under low-turbulent atmospheric conditions when vortices decay slowly. In this study, two methods for simulation of aircraft encounters with such perturbed wake vortices are described and compared. The first method uses a vortex simulation model, which is based on analytical models of the deformation that consider the large-scale vortex shapes. The second method applies vortex-velocity fields from high-fidelity large-eddy simulations. It offers the highest possible level of realism and is used as the reference. The resulting aircraft responses induced by wavy vortices and vortex rings are reproduced with good quality by the vortex simulation model. The comparison of both methods shows that the vortex simulation model captures the overall impact of vortex deformation on the aircraft upsets. It can be used for future safety assessments that require a large number of encounter simulations.
机译：飞机尾流涡流遭遇的模拟通常用于修正飞机最小间隔的研究中。大多数遇到的飞行模拟研究都使用了一对直的反向旋转涡流。然而，在长尾乌鸦的不稳定性下，尾流涡流在被生成飞机掉下后开始发展为形变，尤其是在低湍流大气条件下，当涡流缓慢衰减时。在这项研究中，描述和比较了两种模拟飞机与此类扰动的尾流涡流相遇的方法。第一种方法使用涡流仿真模型，该模型基于考虑了大尺度涡流形状的变形解析模型。第二种方法应用来自高保真大涡模拟的涡流场。它提供了尽可能高的真实性，并用作参考。涡流模拟模型以高质量再现了由波浪形涡流和涡流环引起的飞机响应。两种方法的比较表明，涡流仿真模型捕获了涡流变形对飞机失稳的总体影响。它可用于需要大量遭遇模拟的未来安全评估。

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  • 来源
    《Journal of Aircraft》 |2016年第6期|1581-1596|共16页
  • 作者

    Bieniek D.; Luckner R.; De Visscher I.; Winckelmans G.;

  • 作者单位

    Tech Univ Berlin, Flight Mech Flight Control & Aeroelast, Marchstr 12, D-10587 Berlin, Germany;

    Tech Univ Berlin, Flight Mech Flight Control & Aeroelast, Marchstr 12, D-10587 Berlin, Germany;

    Catholic Univ Louvain, Inst Mech Mat & Civil Engn, Thermodynam & Fluid Mech Div, B-1348 Louvain La Neuve, Belgium|Wake Predict Technol, B-1348 Louvain La Neuve, Belgium;

    Catholic Univ Louvain, Inst Mech Mat & Civil Engn, Thermodynam & Fluid Mech Div, B-1348 Louvain La Neuve, Belgium;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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