METHOD FOR DETERMINING AN INITIAL LEADING EDGE CIRCLE OF AERODYNAMIC PROFILES OF A BLADE AND IMPROVEMENT OF THE BLADE TO INCREASE ITS NEGATIVE STALLING INCIDENCE

摘要

The present invention relates to a method of improving a blade, said blade (1) extending in a longitudinal direction (X) in span from a first end (3) to a second end (4) and in one direction transverse (Y) of a leading edge (5) towards a trailing edge (6), said blade (1) having successive transverse sections, each transverse section being defined by an aerodynamic profile (10), each aerodynamic profile (10) being defined by two half-profiles (11,21) including a half extrados profile (11) and a half intrados profile (21), said two half-profiles (11,21) comprising a leading edge section (12,22), an intermediate section (13,23) and a terminal section (14,24). The method comprises a first step (51) for determining an initial leading edge circle (15,25) for at least one of said two half-profiles (11,21) of at least one aerodynamic profile (10). , an initial leading edge circle (15,25) being attached to a half-profile (11,21), a second step (52) of modifying at least one half-profile (11,21) of at least one aerodynamic profile (10), a third step (53) for moving said leading edge (5) for each aerodynamic profile (10) of said blade (1) and a fourth step (54) for manufacturing said blade (1) according to said modified aerodynamic profiles (10)