Patent ID: 8672618

Claim:
A fluid flow machine, comprising: a hub; a casing; at least one row of variable stator vanes; a main flow path confined by the hub and the casing and in which the at least one row of variable stator vanes is positioned; a multi-vane variable stator unit on at least one of the hub and the casing, having at least two stator vanes connected to a common rotary base to be rotatable around a common rotary axis; wherein a relative camber (f/l) of a centroidally further downstream profile is larger than a relative camber (f/l) of a centroidally further upstream profile, wherein downstream and upstream are in a meridional direction, according to (f/l) downstream >1.2*(f/l) upstream , where: (f) is a profile camber of the stator vane measured as vertical distance between a profile chord of the stator vane and a point of a skeleton line of the stator vane which is furthest off from the profile chord; and (l) is a profile depth of the stator vane measured in a direction of a profile chord of the stator vane.