Structure comprising a rotor and fixed perturbation sources and method for reducing vibrations in said structure

A structure comprising:

• at least one rotor;
• at least one stator;
• and
• at least one set comprising a number N of fixed sources of disturbance;
• the rotor and the set of fixed sources of disturbance configured to have a fluid flow passing substantially perpendicularly therethrough, in which flow the set of sources of disturbance is liable to give rise to disturbances that are subsequently received by the rotor;
• the set of sources of disturbance forming a set of N adjacent angles in a plane substantially perpendicular to the fluid flow, where a sum of said angles is equal to 360°, each angle being defined by two consecutive half-lines having a common point as their origin, which point corresponds, in the fluid flow, to a center of rotation of the rotor, the half-lines also passing through respective geometrical centers of two sources of disturbance;
• wherein in the structure the set of adjacent angles comprises at least one group of first angles that are greater than 360°/N, and at least one group of second angles that are less than 360°/N,
• wherein the set of adjacent angles is constituted by:
• a single group of adjacent first angles;
• a first nominal angle or a first group of adjacent nominal angles, adjacent to said single group of adjacent first angles;
• a single group of adjacent second angles that are adjacent to said first nominal angle or to said first group of adjacent nominal angles;
• and
• a second nominal angle or a second group of adjacent nominal angles, adjacent to said single group of adjacent second angles.

A structure comprising:

• at least one rotor;
• at least one stator;
• and
• at least one set comprising a number N of fixed sources of disturbance;
• the rotor and the set of fixed sources of disturbance configured to have a fluid flow passing substantially perpendicularly therethrough, in which flow the set of sources of disturbance is liable to give rise to disturbances that are subsequently received by the rotor;
• the set of sources of disturbance forming a set of N adjacent angles in a plane substantially perpendicular to the fluid flow, where a sum of said angles is equal to 360°, each angle being defined by two consecutive half-lines having a common point as their origin, which point corresponds, in the fluid flow, to a center of rotation of the rotor, the half-lines also passing through respective geometrical centers of two sources of disturbance;
• wherein in the structure the set of adjacent angles comprises at least one group of first angles that are greater than 360°/N, and at least one group of second angles that are less than 360°/N.
• wherein the set of adjacent angles comprises a plurality of nominal angles or a plurality of groups of adjacent nominal angles, each nominal angle or group of adjacent nominal angles being adjacent both to a group of adjacent first angles and to a group of adjacent second angles.