Numerical modeling of the icing process under conditions of large supercooled droplets

An improved method is proposed that allows increasing the accuracy of three-dimensional calculations of the process of ice formation on aircraft surfaces on large supercooled droplets (SLD) atmospheric conditions. Ice build-up formation is described using mathematical models of liquid film flow SWIM, as well as a model of deposition and splashing of large droplets upon impact with the ice surface. An improvement of the model is proposed that allows calculating the splashing process for both dry and wet surfaces. Validation of the proposed method is performed by comparing the calculation results with the available experimental data obtained on the NACA0012 model profile under SLD conditions. The calculation data showed better agreement with the experiment in terms of shape, size and localization of the formed ice build-ups compared to the results obtained using the Ansys Fensap-Ice software package.