Simulation Methods for Aircraft Encounters with Deformed Wake Vortices
Simulation Methods for Aircraft Encounters with Deformed Wake Vortices
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DOI：
10.2514/1.c033790
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发表时间：
2016-11
影响因子：
2.2
通讯作者：
David Bieniek;R. Luckner;I. D. Visscher;G. Winckelmans
中科院分区：
文献类型：
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作者：
David Bieniek;R. Luckner;I. D. Visscher;G. Winckelmans
飞机尾流涡遭遇的模拟经常应用于修正飞机间隔最小值的研究中。大多数遭遇飞行模拟研究都使用一对直线反向旋转涡流。然而，在被发电飞机甩出后，由于长波克劳不稳定性，尾流涡流开始产生越来越大的变形，特别是在涡流缓慢衰减的低湍流大气条件下。在本研究中，描述并比较了两种模拟飞机遭遇此类扰动尾流涡流的方法。第一种方法使用涡流模拟模型，该模型基于考虑大尺度涡流形状的变形分析模型。第二种方法应用来自高保真大涡模拟的涡速度场。它提供了尽可能高的真实感并被用作参考。涡流以良好的质量再现了由波状涡流和涡流环引起的飞机响应...
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 vort...