某航空事故下的尾流遭遇与风险分析

Wake Encounter and Risk Analysis in an Aviation Accident

为了提高空域飞机运行效率,降低客机延误率,研究飞机尾流以精确划分尾流间隔是很有必要的。对比了国内外现行的尾流间隔标准,梳理了尾流造成的航空事件,列举了典型的尾流事件,并依据库塔-茹科夫斯基定理和毕奥-萨伐尔定律对尾流事件进行了求值计算,得到了尾流强度、初始下降速度和间隔时间。最后根据相应数据确定了尾涡简化包线以及尾流危险区,依据尾流事件和相关参数整体划分了飞机遭遇尾流的程度,并进一步合理预测了尾流所造成事件的严重性。

In the situation of the great development of China′s civil aviation,it is necessary to accurately divide the wake interval by deeply studying the aircraft wake in order to improve the efficiency of airspace aircraft operations and reduce the delay rate of passenger aircraft.This paper compares the current wake separation standards at home and abroad,analyzes the aviation events caused by wake turbulence, lists typical wake events and calculates relevant parameter values based on KUTTA-JOUKOWSKY theorem and BIOT-SAVART law.It obtains the vortex circulation, the initial drop speed and the interval time.Finally,the simply tail vortex envelope and the wake danger zone are determined by the corresponding data,and the actually degree of aircraft wake encounter is divided and the severity of the wake events is predicted according to the previous wake events and related parameters.