Inlet guide vane flap, fan section and control method of variable shape inlet guide vane flap system

摘要

A variable shape inlet guide vane (IGV) system includes a variable-shape IGV flap (48) with a flexible portion (64) that enables the desired spanwise distribution of Cx, alpha, and beta at a fan rotor inlet. An actuation system (68) rotates a root section of the variable-shape IGV flap (48) to flex the flexible portion (64) such that the twisted shape of the flap (48) can reverse rather symmetrically during actuation from max open to max closed.