Numerical Simulation And Verification Of Airfoil/wing Icing Based On FENSAP-ICE

Aircraft icing refers to the phenomenon that some parts of the surface accumulate ice during the flight of the aircraft.Ice accretion will destroy the good aerodynamic shape of the aircraft and seriously reduce the aerodynamic performance of the aircraft.To reduce flight accidents caused by icing and improve the anti-icing/de-icing efficiency of aircraft,it is necessary to predict icing on important parts such as wings.In this paper,the commercial software ANSYS FENSAP-ICE will be used to simulate the different icing conditions encountered by the aircraft during flight,namely,supercooled small droplet icing,supercooled large droplet icing,and mixed-phase ice crystal icing,to explore its impact on airfoil/wing icing.The work of this paper will provide a reference for the design and installation of anti-icing /deicing systems in important parts such as wings.The specific contents are as follows :Firstly,the icing of the airfoil under the condition of supercooled small droplets is numerically simulated.The effects of flight speed,flight angle of attack,atmospheric pressure,liquid water content,water droplet diameter,and ambient temperature on the icing parameters such as water droplet collection coefficient,water droplet collection range,icing thickness,and icing range of NACA 0012 airfoil were investigated.The influence of different influencing factors on airfoil icing was obtained.In addition,the influence of icing on the aerodynamic characteristics of airfoils is also explored.Secondly,the numerical simulation of ice accretion on airfoil under supercooled large droplet conditions and mixed-phase ice crystal conditions is carried out,and the difference between supercooled large droplets and supercooled small water droplets is discussed.By changing the physical model of supercooled large droplets,the influence of its dynamic behavior on airfoil icing is studied.By changing the working condition of mixed-phase ice crystal icing,its influence on airfoil icing was explored.Finally,the icing prediction of the three-dimensional wing and wing-body combination is carried out.Firstly,the numerical simulation of the straight wing,trapezoidal wing,and swept wing is carried out to explore the distribution of icing on the three-dimensional wing.Then,the icing numerical simulation of the DLR-F6 wing-body combination was carried out,and the distribution of water droplet collection efficiency and icing distribution of the whole machine was obtained.Finally,through the ice wind tunnel experiment,the ice growth on the wing surface can be more clearly understood.