近地阶段ARJ21飞机尾流遭遇安全性研究

在实际管制运行中，为了缩短ARJ21飞机与前机尾流间隔，同时避免尾流遭遇危险事件的发生，选取前机机型为A330-200重型机，分别对ARJ21纵向和横向穿越前机尾涡场两种模式下的风险性进行了分析。首先建立了前机尾涡耗散与速度诱导模型，然后根据ARJ21遭遇尾流受力响应模型进行求解，分别计算出两种尾流遭遇模式下ARJ21整机、机翼、机身、平尾及发动机升力与力矩的变化，最后计算得出滚转力矩系数指标和过载增量指标进行安全性验证。结果表明：当ARJ21以ICAO规定的尾流间隔纵向遭遇尾涡时，其滚转力矩系数小于0.04，过载增量与安全裕度之和小于0.5；在交叉跑道上空横向遭遇尾涡时，过载增量与安全裕度之和小于0.5，验证了ICAO尾流间隔标准的安全性。ARJ21跟随A330-200的尾流间隔较ICAO标准缩短2481m,缩减率为26.79%，有效提高了机场的运行效率。

Study on the safety of ARJ21 aircraft wake encounter during near-earth stage

In the actual control operation, in order to shorten the wake interval between ARJ21 and the front aircraft and avoid the occurrence of dangerous wake events, A330-200 heavy aircraft was selected as the front aircraft, and the risk of ARJ21 crossing the front aircraft''s wake vortex field in longitudinal and transverse modes was analyzed respectively. First before the tail induced eddy dissipation and speed model is established, and then according to the ARJ21 in drafting are applied to solve the stress response model respectively to calculate two kinds of drafting a mode the ARJ21, wing, fuselage, tail and engine lift and the change of the moment, finally calculated roll moment coefficient index and overload incremental index for security verification. The results show that when ARJ21 encounters the wake vortex longitudinally at the wake interval specified by ICAO, its rolling moment coefficient is less than 0.04, and the sum of overload increment and safety margin is less than 0.5. The sum of overload increment and safety margin is less than 0.5 when the wake vortex encounters horizontally over the crossing runway, which verifies the safety of ICAO wake interval standard. The wake interval of ARJ21 following A330-200 is 2481m shorter than that of ICAO standard, and the reduction rate is 26.79%, which effectively improves the operation efficiency of the airport.