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20世纪70年代以来,对一些大型运输机在起降时发生的严重事故的分析后确认,低空风切变是引起这些飞机失事的主要原因,为了了解其产生过程和变化规律,本文统计分析了大理机场风切变出现情况,之后就大理机场2012年3月25日发生的一次强低空风切变进行了分析。分析发现,大理机场低空风切变主要出现在干季的日出之后,这次低空风切变的产生主要是风场向气压场的调整,在风切变最强阶段,风向切变与风速切变同时存在,且低空风切变呈现空间尺度小,强度大的特点。通过此次分析,有助于提前预判大理机场低空风切变的产生和消失过程,以便及时提醒管制员和飞行员,更好的保障飞行安全、正常。
Since the 1970s, the analysis of some serious accidents occurred during the take-off and landing of some large transport aircraft confirmed that the low-level wind shear was the main cause of these aircraft crashes. In order to understand the generation process and variation, this paper analyzes the Dali The occurrence of windshear at the airport was followed by an analysis of a strong low-level windshear event on March 25, 2012 at Dali Airport. The analysis shows that the low-level wind shear at Dali Airport mainly occurs after the sunrise in dry season. The low-level wind shear is mainly caused by the adjustment of the wind field to the pressure field. During the strongest wind shear, the wind shear and wind speed Shear exist at the same time, and the low-level wind shear shows the characteristics of small space scale and large intensity. Through this analysis, it helps to anticipate the occurrence and disappearance of low-level windshear at Dali Airport in advance so as to promptly remind controllers and pilots to better ensure flight safety and normality.