We also consider the effect of vortex decay over time caused by the viscidity of atmosphere in our vortex model in estimating the vortex effect experienced during the close proximity formation flight.
在估算紧密编队飞行中长机翼尖涡对僚机的影响时，本文在所用到涡模型中也考虑了由空气粘性引起的涡流随时间的衰减效应。
The large eddy simulation methods can be used to analysis and calculate the decay and transport rules of wake vortex in near ground phases, but it′s too complex and difficult to use.
采用大涡模拟方法可以分析和计算近地阶段尾涡消散和运动规律，但模型繁琐、计算复杂。
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