Turbomachine fan flow-straightener vane, turbomachine assembly comprising such a vane and turbomachine equipped with said vane or said assembly

A flow-straightener vane of a bypass turbomachine with a longitudinal axis (X), the vane comprising a plurality of vane sections stacked radially with respect to the axis (X) along a stacking line (L) between a root end and a tip end, each vane section comprising a pressure-face surface and a suction-face surface extending axially between an upstream leading edge and a downstream trailing edge and being tangentially opposed,

• wherein between the leading and trailing edges of each vane section there is formed a profile chord (CA) the length of which is constant between the tip end and the root end, and in that the stacking line (L) has a curvature, in a plane passing through the axis (X) and through the stacking line (L), located in the vicinity of the tip end and oriented from downstream to upstream,
• wherein the shape of the vane between 50% and 95% of a height of the vane is determined by the following relationship:
• 0.1<(L2/L1)50% H<H<95% H<0.5, with L2 corresponding to a minimum distance between the leading edge of the vane and a straight line (A) passing through the root end and the tip end of the vane, L1 corresponding to a length between this same line (A) and the trailing edge of the vane, and H being the height of the vane.