DEVICE AND METHOD FOR DETECTING A MODIFICATION OF THE AERODYNAMIC INFLOW CONDITIONS OF ROTATING TURBINE BLADES

摘要

The invention relates to a method for detecting a modification of the aerodynamic inflow conditions of the turbine blades (6) rotating when the turbine (2) is in operation. Said method consists of the following steps: the operating noise (x(t)) of the turbine (2) is detected (16) and filtered (20) for determining a rotating sound (d(t)) caused by the rotating turbine blades (6), a value of the amplitude and/or phase of the rotating sound (d(t)) is recorded (22) for a plurality of successive times, the recorded values are analysed (22) and a modification of the aerodynamic inflow conditions of the rotating turbine blades (6) is detected prior to or after inputting the modification using a difference in the values of the amplitude and/or phase of the rotating sound (d(t)).