The numerical method of determining the water droplet impingement property of rotor blade in hover was studied. According to the quasi-steady property, the rotor's model in hover was simplified. Based on the calculation of flow field around the blade, the droplet trajectories were obtained through the difference method. And then, the parameters of droplet impingement on blade were given, which provided the conditions for rotor anti-icing/deicing system design. Finally, the impingement properties of NACA0012 were presented as an example.
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