Identification of vortex-induced clear-air turbulence using airline flight records
Identification of vortex-induced clear-air turbulence using airline flight records
复制标题
使用航空公司飞行记录识别涡流引起的晴空湍流
DOI：
10.2514/3.45095
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
R. S. Mehta
中科院分区：
文献类型：
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作者：
E. Parks;R. Wingrove;R. Bach;R. S. Mehta
正在与国家运输安全委员会合作，利用航空公司遭遇严重湍流的飞行记录来调查晴空湍流的性质和原因。本文介绍了两个严重湍流的案例研究，表明涉及的飞机遇到了由对流层顶附近不稳定的风切变层产生的涡流阵列。为了识别和分析涡流模式（即涡流强度、大小和间距），开发了涡流阵列的势流模型，该模型可以很好地描述从客机飞行记录中得出的风模式。分析结果表明，在所研究的两种情况下，涡核的直径在 900 至 1,200 英尺范围内，切向速度在 70 至 85 英尺/秒范围内。这项研究首次对航空公司飞行数据中的涡流阵列进行了识别和分析。结果与理论预测和先前的观察结果进行了比较。
The nature and cause of clear-air turbulence is being investigated, in cooperation with the National Transportation Safety Board, using the flight records available from airline encounters with severe turbulence. This paper presents two case studies of severe turbulence which indicate that the airplanes involved encountered vortex arrays which were generated by destabilized wind-shear layers near the tropopause. In order to identify and analyze vortex patterns (i.e., vortex strength, size, and spacings), potential-flow models of vortex arrays were developed that describe reasonably well the wind patterns derived from the airliner flight records. The results of this analysis indicate that in the two cases studied, the vortex cores had diameters in the range of 900 to 1,200 ft with tangential velocities in the range of 70 to 85 ft/sec. This study presents the first identification and analysis of vortex arrays from airline flight data. The results are compared with theoretical predictions and previous observations.