| 摘要 |
A method for estimating the surface condition of a blade (100) rotating about a rotational axis (40) in an air or fluid stream, the method comprising the steps of:
- measuring blade deformations indicative of blade loads acting on the blade (100) to identify actual blade loads ( P, R, T ),
- measuring blade-state information (¨, ©, , V ) indicative of a blade operational state to identify a given blade operational state ( ± , Q ),
- providing a clean-surface aerodynamic map ( ) relating blade loads to an ensemble of blade operational states when the blade surface is in a clean state,
- providing a dirty-surface aerodynamic map ( ) relating blade loads to an ensemble of blade operational states when the blade surface is in a dirty state,
- estimating the surface condition of the blade (100) by comparing the distance of the actual blade loads ( P, R, T ) to the blade loads given by the clean-surface aerodynamic map ( ) at the given operational state ( ± , Q ), and the distance of the actual blade loads ( P, R, T ) to the blade loads given by the dirty-surface aerodynamic map ( ) at the given operational state ( ± , Q ) . |
