基于条带状模型的航空器巡航阶段尾流风险区计算

为缩短巡航阶段尾流间隔与垂直间隔，提高空域利用率，首先建立尾流运动模型与尾流耗散模型，使用条带状模型计算后机遭遇前机尾流的气动力矩，以滚转力矩系数极限值作为衡量尾流风险的指标，计算不同机型、不同高度层以及不同起飞重量下的尾流危险区域，并对其影响范围进行分析。最后结合危险区与后机航道的重叠范围确定最小尾流安全间隔。结果表明：与近地阶段相比，巡航阶段尾流初始环量大，耗散速度快。高度层增高会使尾流下沉加快，尾流危险区与垂直间隔增大，水平间隔减小；飞机重量增大会使尾流危险区与垂直间隔变大，水平间隔减小；超重型机的危险区远大于重型机与一般重型机。中型机与不同重型机的水平间隔可缩减38%-57%，垂直间隔至少可缩减至100m。研究结果为制定巡航阶段尾流安全间隔标准具有实际参考价值。

Calculation of wake vortex hazard zone in aircraft cruise stage based on strip model

In order to shorten the wake interval and vertical interval in the cruise phase, and improve the airspace utilization rate, the wake motion model and the wake dissipation model are firstly established, and the strip model is used to calculate the aerodynamic moment of the rear aircraft encountering the front aircraft wake, and the rolling torque is used to calculate the aerodynamic moment. The coefficient limit value is used as an index to measure the wake risk, and the wake hazard area under different aircraft types, different altitudes and different take-off weights is calculated, and its influence range is analyzed. Finally, the minimum wake safe separation distance is determined by combining the overlapping range between the hazard zone and the rear aircraft channel. The results show that compared with the near-Earth stage, the initial circulation of the wake is larger and the dissipation speed is faster in the cruise stage. The increase of the altitude will make the wake sink faster, the wake hazard zone and the vertical interval will increase, and the horizontal interval will decrease; the increase of the aircraft weight will make the wake hazard zone and the vertical interval larger, and the horizontal interval will decrease; the hazard of super-heavy aircraft The area is much larger than that of heavy-duty machines and general heavy-duty machines. The horizontal interval between medium-sized aircraft and different heavy-duty aircraft can be reduced by 38%-57%, and the vertical interval can be reduced to at least 100m. The research results have practical reference value for formulating the wake safety separation standard in the cruise phase.