FIELD: power engineering.
SUBSTANCE: invention relates to rotor blade of wind-driven power plant. Wind power unit rotor blade (200) comprises rear side (201), front side (202), blunt rear edge (200c), rotor blade base area (210), rotor blade top area (220) and element (500) for extension of rear edges, which is located on blunt rear edge (200c) and has at least two steps. Element (500) for extension of trailing edge has first end (510), second end (520), first and second sections (530, 540). Transition from blunt trailing edge (200c) to first section (530) on first end (510) of element (500) for extension of trailing edge is substantially non-perpendicular, and transition between first and second sections (530, 540) is also non-perpendicular. Blunt trailing edge (200c) and element (500) for extension of trailing edge are made in area (210) of rotor blade base. Second end (520) of element (500) for extension of trailing edge is blunt.
EFFECT: invention is aimed at eliminating cyclic phenomenon of vortex failure and noise reduction.
3 cl, 8 dwg
