Elementary Research On Large Wind Turbine General Design Method

Aimed to master the key general design of large wind turbine, several design theories were analyzed to reveal the relations among general design parameters and influence of subsystem on general layout, and a method to resolve the contradiction between structural intensity and aerodynamic performance was put forward. A conclusion was drawn that Momentum theory, Vortex theory and Generalized dynamic wake were practicable to get the general design parameters and loads, loads cycles of the rotor were the main vibration excitation, and good dynamic compatibility between rotor and tower is propitious to the well function of the wind turbine unit. According to the analysis of the blade design, a structural coefficientκwas introduced, by which the blade was divided into inner part and outer part. Blunt airfoil was adopted to strengthen the inner part, of which the key characteristic is structural intensity, while the aerodynamic characteristics of airfoils were highlighted in the outer part. The design demonstrated that both structural intensity and aerodynamic characteristics of blade were maintained with this kind of configuration. A case design was compared with NORDEX S70 wind turbine and the consilient result demonstrated that feasibility of the general design and system configuration.