Abstract: A vortex generator for wind turbine blade includes: a platform; and at least one fin disposed projecting from an upper surface of the platform, and including a leading edge and a trailing edge. A rear end surface of the at least one fin, including the trailing edge, has a shape inclined backward as a distance from a bottom surface of the platform increases in a height direction of the fin.

Abstract: A method for determining an arrangement position of a vortex generator on a wind turbine blade includes: determining, for a first region of a mounting range of the vortex generator in a blade spanwise direction, an arrangement position of the vortex generator to be an angular position offset by a predetermined angle toward a trailing edge of the wind turbine blade with reference to an inflow angle of wind to the wind turbine blade; and determining, for a second region closer to a blade tip, the arrangement position of the vortex generator to be a position between a separation position of a flow on a surface of the wind turbine blade under a rated wind speed condition and a transition position of the flow on the surface of the wind turbine blade under a variable speed operation condition of a wind turbine including the wind turbine blade.

Abstract: A wind turbine blade has a vortex generator including a plurality of fins, and a height H(m) of each of the fins and a maximum chord length C (m) of the wind turbine blade satisfies 0.3×10?2?H/C?0.9×10?2. The height H of the fins may satisfy H?0.1?1, provided that ?1 is a boundary layer thickness at a rated tip speed ratio in a blade degradation state. A method for determining arrangement of a vortex generator on the wind turbine blade includes a pair of the fins arranged line-symmetrically with respect to a segment along a chordwise direction of the wind turbine blade.

Abstract: A wind turbine blade comprising a vortex generator including a plurality of fins. The plurality of fins include a first fin positioned closest to a blade tip, and the first fin is disposed closer to a blade root than a position closer to the blade tip, of a blade spanwise directional position at which a ratio t/C of a blade thickness ‘t’ to a chord length C is 0.4 or a radial directional position of 0.2R with respect to a radius R of a rotor including the wind turbine blade. The vortex generator may include at least one fin disposed in a mounting range of zero to 0.1 R, such that a ratio x/C of a chordwise directional position x of the at least one fin to the chord length C satisfies 0?x/C?0.2.

Abstract: A vortex generator for a wind turbine blade includes at least one fin including a suction surface and a pressure surface. Each of the at least one fin is configured such that, in at least a part of a height range of the fin, a maximum camber ratio cmax/C being a ratio of a maximum camber cmax to a fin chord length C decreases with distance from a root of the fin toward a tip portion of the fin.

Abstract: A wind turbine blade comprising a vortex generator including a plurality of fins. The plurality of fins include a first fin positioned closest to a blade tip, and the first fin is disposed closer to a blade root than a position closer to the blade tip, of a blade spanwise directional position at which a ratio t/C of a blade thickness ‘t’ to a chord length C is 0.4 or a radial directional position of 0.2 R with respect to a radius R of a rotor including the wind turbine blade. The vortex generator may include at least one fin disposed in a mounting range of zero to 0.1 R, such that a ratio x/C of a chordwise directional position x of the at least one fin to the chord length C satisfies 0?x/C?0.2.

Abstract: A wind turbine blade has a vortex generator including a plurality of fins, and a height H(m) of each of the fins and a maximum chord length C (m) of the wind turbine blade satisfies 0.3×10?2?H/C?0.9×10?2. The height H of the fins may satisfy H?0.1?1, provided that ?1 is a boundary layer thickness at a rated tip speed ratio in a blade degradation state. A method for determining arrangement of a vortex generator on the wind turbine blade includes a pair of the fins arranged line-symmetrically with respect to a segment along a chordwise direction of the wind turbine blade.

Abstract: A method for determining an arrangement position of a vortex generator on a wind turbine blade includes: determining, for a first region of a mounting range of the vortex generator in a blade spanwise direction, an arrangement position of the vortex generator to be an angular position offset by a predetermined angle toward a trailing edge of the wind turbine blade with reference to an inflow angle of wind to the wind turbine blade; and determining, for a second region closer to a blade tip, the arrangement position of the vortex generator to be a position between a separation position of a flow on a surface of the wind turbine blade under a rated wind speed condition and a transition position of the flow on the surface of the wind turbine blade under a variable speed operation condition of a wind turbine including the wind turbine blade.

Abstract: A vortex generator for a wind turbine blade includes at least one fin including a suction surface and a pressure surface. Each of the at least one fin is configured such that, in at least a part of a height range of the fin, a maximum camber ratio cmax/C being a ratio of a maximum camber cmax to a fin chord length C decreases with distance from a root of the fin toward a tip portion of the fin.