Abstract
A calculation method is developed to analyze the characteristics of the water film flow on anti-icing airfoil surface. The mathematical model for the mass and heat transfer of the water film flow on anti-icing surface considers two regions, the runback water region and the external air flow region above the anti-icing surface. Both of the air flow boundary and water flow layer are subjected to mass, momentum and energy conservation. The thickness and velocity distribution of the water film flow can be predicted by this approach. Due to the influence of the aerodynamic shear force and surface properties, the water film becomes unstable and then breaks up into individual rivulets. The mathematical model of water flow evolution is presented and is used to predict the shape of the rivulets on the airfoil surface. The characteristics of the runback water on the anti-icing airfoil surface are described and analyzed. A reference case is chosen to validate the calculation method.
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