Abstract
Ice ridges deteriorate aerodynamics performance and endanger flight safety. With structural grid and central finite volume method the airflow field is obtained by solving N-S equations. Lagrange method is employed to get the trajectory of water droplets. Based on Messinger icing thermodynamics model, icing accretion on the leading edge of NACA 0012 is simulated and the results agree well with the experiment data, which verifies the feasibility and accuracy of the method. Based on this, on the conditions of small and large water droplets, the effects of ambient temperature and liquid water content on ice ridges are studied respectively. Besides, with the plasma phenomenological model the effects of nanosecond-pulse dielectric barrier discharge plasma actuator on ice ridges are studied. The results show that: whether small or large water droplets, the decrease of ambient temperature will cause the ice ridge height to increase and the increase of liquid water content will lead both the height and the range to increase; in the case of the small water droplets ambient temperature has little influence on the range; however, in the case of large water droplets the increase of ambient temperature will lead the range to increase; nanosecond-pulse dielectric barrier discharge plasma actuator can remove the ice ridges caused by the small water droplets and can postpone the position of ice ridges caused by the large water droplets.
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