I.V. Morozova - Junior Research Scientist, Central Aerohydrodynamical Institute, named after prof. N.E. Zhukovsky (TsAGI) V.I. Sadchikov - Ph.D. (Eng.), Associate Professor, Leading Research Scientist, Central Aerohydrodynamical Institute, named after prof. N.E. Zhukovsky (TsAGI). E-mail: flight15@tsagi.ru