The invention relates to an annular cover for a turbomachine nozzle, the
cover having a plurality of patterns extending a trailing edge of said
cover and spaced apart circumferentially from one another, each pattern
having an outline that is substantially triangular in shape, with a base
formed by a portion of the trailing edge of the cover and a vertex spaced
downstream from the base and connected thereto by two sides. For each
pattern, the vertex presents an outline that is substantially curved;
each side is connected to the trailing edge of the cover following an
outline that is substantially curved having a radius of curvature that is
greater than the radius of curvature of the outline of the vertex; and
the outline of each of the sides includes at least one point of inflexion
having a tangent that is substantially parallel to the base.