Based On The Numerical Simulation Of Aircraft Wing Icing Research

Icing phenomenon is one of the important reasons for the flight accident. Aircraft wings is a major part of the aircraft icing. When the aircraft flying under icing meteorological conditions, the supercolled water droplets will hit the aircraft wings windward surface and produce icing, called ice accretion on aircraft wings. It will change the aerodynamic shape of the wing, which will lead to lift decreases and drag increases.It has seriouly affected flight safety.The major method of research on ice accretion on aircraft wings includes engineering estimating, experimental research and numerical simulation. In this paper, the method of numerical simulation of research on ice accretion on aircraft wings mainly includes: 1. The air flow field is solved based on incompressible Navier-Stokes equation; 2. The S-A turbulent model is established based on the Reynolds average method; 3. Trajectories and impact properties of the supercooled water droplets are calculated. The supercooled water droplets motion equation are established based on Eulerian two-phase flow method, considerating of air viscosity; 4. The modified thermodynamic model of ice accretion is established based on traditional Messinger thermodynamic model of ice accretion, considerating of shallow water film flow on the icing surface; 5. The roughness of icing surface calculation model is established based on the NASA's empirical formula and data.In this paper, NACA0012 and NACA0015 airfoil are used as examples. Under three typical temperatures, numerical calculation results of NACA0012 airfoil icing are sloved, which are in accordance with experiment results. This also proves that the method of numerical simulation in this paper is feasible and effective. At the same time, the affect of different icing parameters on the icing shape, the water droplets collection rate and the supercooled water droplet trajectories of NACA0012 airfoil are analyzed in this paper. On the other hand, NACA0015 airfoil and NACA0015 icing airfoil under two typical temperatures are used as examples, analyzing the influence on aerodynamic performance from three aspects, the lift and drag characteristics, the pressure distribution characteristics and the air flow around the flow characteristics.