Noise reducing method for e.g. turbomachine, involves sucking air from leading edge of fan blade towards blade base and blowing air at trailing edge towards blade head, where air is transported between inlet and outlet orifices of channel

摘要

The method involves sucking air from a leading edge (30) of a fan blade (18) towards a blade base (34), and blowing air at a trailing edge (32) towards a blade head (36). The air is transported across the blade between an inlet orifice (42) and an outlet orifice (44) of a channel (40) that is arranged in the blade. The inlet orifice emerges from the leading edge and the outlet orifice emerges from the trailing edge. Independent claims are also included for the following: (1) a silencer device for implementing a noise reduction method (2) an aircraft engine (3) a fan blade (4) a turbomachine (5) a fan.