A vertical axis wind and hydraulic turbine with flow control comprising a regular hexagonal structure of a radius, parallelepiped-shaped, inside which a rotor with three or more vanes is configured to rotate on a vertical axis which is located in the center of the regular hexagonal structure as seen from above, wherein said vanes are rotatable and define a circle of a rotor radius (Rt), further comprising a wind or liquid inlet to the rotor and a wind or liquid outlet from the rotor, and further comprising six articulated deflector vanes, which are configured to grab and concentrate the flow of air or liquid entering the rotor vanes, from the wind or liquid current entry side to the turbine and to diffuse the flow of air or liquid exiting from the rotor vanes, on the side opposite to the wind or liquid entry side to the turbine, wherein each one of the six articulated deflector vanes comprises a fixed part included in the regular hexagonal structure and a moveable part, said movable parts being configured to rotate about axes parallel to the rotor axis that are on each of six vertices of the regular hexagonal structure viewed from above to open and close the wind or liquid inlet to the rotor and the wind or liquid outlet from the rotor, wherein the movable part of the articulated deflector vanes has a profile designed aerodynamically in the shape of an aircraft wing, which has an upper convex zone on an upper surface and a lower concave zone on a lower surface, being the upper convex zone joined to the lower concave zone through a convex semicircle of a curvature radius (r) at the widest part of the profile, wherein said curvature radius (r) is the curvature radius (r) of a leading edge of the movable part, and forming an acute angle at the less wide portion of the profile, which corresponds to the outer end, namely a trailing edge, of the moveable part, wherein the fixed part of the articulated deflector vanes has a profile that continues the convex zone of the upper surface of the movable part at the upper convex zone and continues the concave zone of the lower surface of the moveable part at the lower concave zone, wherein at the final section close to the rotor of the fixed part the curvature changes of course and direction to attain a higher performance as the fluid enters tangentially to the circumference of the rotor radius (Rt) generated by the rotation of the rotor vanes, wherein the upper convex zone joins with the lower concave zone of the side of the moveable part by a concave surface of a semicircle of curvature radius (r), wherein a curvature radius (r') of the fixed part closest to the moveable part is greater than the curvature radius (r) of the leading edge of the movable part, and the upper convex zone joins with the lower concave zone of the rotor side through a concave surface of a semicircle of a rotor radius (Rt') of the fixed part closest to the rotor which rotor radius (Rt') of the fixed part is greater than the rotor radius (Rt) of rotor being the rotor radius (Rt) of the circle generated by the rotation of the rotor vanes, wherein the center of said concave surface of the semicircle of curvature radius (r') of the fixed part and the center of the curvature radius (r) of the leading edge of the movable part are coincident.