The use of vertical-axis turbines is raising interest in the field hydropower production from rivers or water channels, where suitable mass flows are available, without need high jumps large construction sites. Although many optimization studies on have been carried out for wind applications, lesser examples exist technical literature regarding hydrokinetic turbines. In latter case, best trade-...

The paper presents the results of an experimental study a vertical wind turbine type Darrieus with frontal cylindrical guide vane unit. main goal research is to analyze influence geometry classical unit on active and passive zone turbine. aerodynamic scheme synthesized by classic runner vanes. Three different guiding devices model frontally located vanes have been studied. Their characteristics...

Vertical axis turbines, also called Darrieus present interesting characteristics for offshore wind and tidal applications but suffer from vibrations a lower efficiency than the more conventional horizontal turbines. The use of variable pitch, in order to control angle attack blades continuously during their rotation, is considered this study overcome these problems. 2D blade-resolved unsteady R...