• Experimental and numerical analysis of wind turbine model

    Machines. Technologies. Materials., Vol. 13 (2019), Issue 5, pg(s) 206-209

    Global demand for electric energy is predicted to increase in the coming decades. Following this, different approaches for additional electricity production are analysed and tested worldwide. The EU supports the production and usage of electricity from renewable energy sources, particularly wind energy, because it provides electricity without giving rise to any carbon dioxide emissions. The presented work analysis the possibility for utilising of wind-generated electricity as a stand-alone system for small off grid cabin supply. The very basic turbine geometry was designed and numerically simulated with commercial CFD software. After that, the turbine model was printed using 3D printer and tested in laboratory environment. The comparison of numerically and experimentally obtained operating characteristics show reasonable agreement and strong potential for system optimisation and improvements.


    Machines. Technologies. Materials., Vol. 9 (2015), Issue 3, pg(s) 26-29

    Planetary gear systems are widely used in wind power systems because of the advantages of compact design, large carrying capacity, and high transmission efficiency. Despite these advantages, the several conditions under which such gears are typically used may lead to failure. Tooth pitting is one of the frequently encountered failure modes. The damage of teeth (as tooth pitting) is modeled for a wind turbine drive train. The drive train has got a three-stage gearbox that contains two high-speed parallel gear stages and a low-speed planetary gear stage. The proposed dynamic model of a wind turbine also includes a rotor and an electric generator. The model consists of 10 bodies and has got 11 degrees of freedom. The aerodynamic and generator torques are applied as external loads. The influence of tooth pitting on the gear mesh stiffness is scrutinized. Healthy drive train dynamic response and response of drive train containing tooth pitting are compared. The obtained results give an useful information about health monitoring of wind turbine drive train.