| Summary: | Obtaining droplet collection efficiency (<i>DCE</i>) is vital for icing numerical simulations. A droplet impact model based on the Eulerian two-phase flow model was established in this work to analyze the influence of different incoming flow parameters on <i>DCE</i>. Then, the mathematical regularity of the <i>DCE</i> distribution was explored using the parametric description, and the functional relation of the regularity between the incoming condition and the <i>DCE</i> distribution was accomplished. The results showed that the calculated <i>DCE</i> of NACA0012 and the two-dimensional cylinder matched well with the test data. The incoming flow velocity and droplet size, rather than the liquid water content (<i>LWC</i>) of the incoming flow, affected the collection efficiency significantly. The <i>DCE</i> distribution under different conditions was normalized to the same mathematical form with the peak collection efficiency and maximum position. The mathematical form had a highly normal distribution, which was expressed with good regularity of the Reynolds number and droplet diameter. Regularity can greatly reduce the amount of calculation and improve the calculation accuracy, which plays a positive role in the numerical prediction of the icing problem.
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