Abstract
A process for attenuating noise generated in a turbomachine by the interaction of rotor blades with stator vanes downstream of the rotor blades comprises the injection of a fluid in continuous jets upstream of the blades through a number of orifices equal to the number of vanes. The orifices are arranged in a ring and are capable of pivoting about the rotor axis by an angle at least equal to the angular pitch between two consecutive vanes. The angular position is controlled so that the sound waves produced by the interaction between the jets and the blades are of opposite phase to those produced by the interaction of the blades with the vanes.
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