Aleksieienko S. Scientific and methodological bases of icing processes modeling of aircrafts aerodynamic surfaces

The scientific and methodological foundations for the creation of mathematical models, techniques, algorithms and programs describing the processes of hydroaerodynamics and heat and mass transfer taking into account phase transitions occurring during the icing of aircraft are developed in the thesis. A series of experimental studies of the freezing of freezing moisture on a streamlined surface, including a study of the microphysics of the interaction process of incoming supercooled water droplets with the surface, the structure of the formed ice, and the freezing process of a supercooled surface drop is carried out. On the basis of the experiments carried out, the technique for modeling the buildup of ice was improved. Systemic multiparametric studies in the range of flight and meteorological parameters in which icing occurs have been carried out. The developed software and methodological support can be used along with flight tests, as well as ground-based experiments to simulate the process of formation of ice outgrowths, including ice formed during operation of the de-icing system, thermal de-icing system under the conditions of "barrier" ice in the given meteorological conditions and evaluation of the influence of such growths on the performance characteristics of aircraft. The obtained results can find application in the design of anti-icing systems, flight safety, in the certification of aircraft for flight in icing conditions, in the investigation of aviation accidents.