Evaluation of influence of turbulence models on the vortex formation processes modeling in wind power

The paper studies the results of mathematical modeling external flow Siemens 3D model SWT3.6120 (B52 air foil) horizontal axis wind turbine (HAWT), using NavierStokes equations averaged by Reynolds (RANS) closed byk,kShear Stress Transport (SST) and Eddy Viscosity (EVT) turbulence models. task correct determination speed vector deviation angle over nacelle HAWT is required operation yawing system, which determines in turn efficiency entire turbine. Struhal number was chosen as a comparison criterion, defined for transverse around cylinder, describing frequency formation vortex structure behind butt part blade HAWT. calculated area consists 3million tetrahedral volumes with prismatic layer on surface nacelle, local grinding. place direction parameters registration located at height 3 m above distance 8m from shank, corresponds to standard location weather vane. analysis obtained showed that thekand EVT models describe almost same way, but represents just one differential equation, thereby it preferable computational cost criterion. Also, advantages one-parameter (EVT model) smaller closing semi-empirical constants, allows expanding engineering techniques scope turbulent processes solving practical problems related design control systems turbines, increasing their efficiency.