结冰条件下大型飞机翼面分离流场结构及空气动力学特性研究

结冰对飞机的空气动力学影响特性是飞机结冰研究的重要内容。构建了具有典型大型客机几何外形的背景飞机模型，基于RANS方法对机翼结冰条件下全机的复杂空间流场结构及气动特性进行了研究。研究结果表明，机翼结冰主要影响背景飞机失速点附近的气动特性，翼面分离始发大幅提前、分离梯次完全消失是全机失速特性恶化、气动边界缩小的直接原因。研究可为深刻认识飞机结冰对气动力影响的流动机理提供支撑，为大型飞机结冰后的气动特性分析及飞行动力学研究提供依据。

Research on the Airflow Separation Structure and Aerodynamic Charact eristics of Large Aircraft under Condition of Ice Formation on Wings

The influence of icing on the aerodynamics of aircraft is a focal point of aircraft icing research contents. An aircraft model on the background of a typical geometry of large passenger aircraft is constructed. By the RANS method, the complex flow field structure and aerodynamic characteristics of the aircraft under condition of wing icing are studied. The research results show that the wing icing mainly affects the aerodynamic characteristics near the stall point of the background aircraft, and the departure of the airfoil flow separation is greatly in advance and the separation ladder disappears completely, which is the direct reason for the deterioration of the stall characteristics and the reduction of the aerodynamic boundary. The study can provide full support to deeply understand the aerodynamic flow mechanism of the effect of aircraft icing on aerodynamics, and provide a basis to analyze aerodynamic characteristics and flight dynamics of large aircraft after icing.