Romanyuk L. Calculation Methods Development of Turbulent Flat Boundary Layers Basing on Improved One-parameter Model.

The thesis is divoted to the study of formation of turbulent flat boundary layers calculation methods. The one-parameter turbulent viscosity pattern was improved. The approximate analytic solutions for turbulent kinetic energy which are used to provide initial conditions were offered. The numeric modeling of turbulent boundary flows was carried out. The comparison of calculations of parameters with the canonic experiments of Stanford conference was done. The pattern coefficient for balanced and unbalanced turbulent flat boundary layers was clearly determined. The comparison and analysis of obtained calculations of Stanford conference canonic experiments of pressure gradient change as well as Reinold's numbers for balanced and unbalanced flows according to the calculations of other authors allow us to state that the methods offered by them are more available ones but they better coincide with the experiment under sufficient pressure gradients. Thus the problem of forming efficient turbulent flat boundary layers calculation methods basing on single one-parameter coefficient model of turbulent viscosity was stated and solved.