Influence of the model coefficients changes in the Menters k-w SST turbulence model on the parameters of the flow around the aerodynamic airfoil

The studies presented in the article relate to the field of aircraft aerodynamics, they are aimed at improving the accuracy of separation flows modeling with using the RANS turbulence model. To conduct the research, the method of mathematical modeling was used with using a package of computational fluid dynamics application programs. Based on the results of numerical modeling, the effect of reducing the constant a1 the RANS turbulence model (k-ω SST of the Mentor) on the parameters of the flow around the airfoil NACA 0012 was estimated. The investigated flow is assumed to be incompressible, three-dimensional, the Reynolds number Re = 3.106, the range of the studied angles of attack α = 0…15°. In study used hexagonal grid model, the boundary layer is made from the condition of limiting the dimensionless distance to the wall Y+