Rotor sensor


The rotor sensor can be added by toggling on the Sensor button in the Rotor part shown in the following picture:



For multi-rotor wind turbines, a sensor is available for each rotor

The Rotor sensor provides the following fields:

FieldUnitDescription
Power (aero)kWaerodynamic power, i.e. the power exerted by the air on the blades
Torque (aero)kNmaerodynamic torque, i.e. the moment around the main shaft axis resulting from the aerodynamic forces on the blades
Thrust (aero)kNtotal aerodynamic force on the rotor in the main shaft direction
RPM1/mrevolutions per minute of the rotor, number of revolutions the turbine does in one minute. Also called Rotational speed or Rotational velocity
TSR-Tip speed ratio, ratio of the velocity of the tip of a blade over the wind speed magnitude at the hub
Pitch angledegreesangle by which the blades are rotated around the pitch axis. The pitch axis corresponds to the longitudinal axis if the blades are not prebend
Power coefficient (Cp)-ratio of the aerodynamic power over the total available power in the air (see CP - Power coefficient)
Thrust coefficient (Ct)-ratio of the thrust force over the dynamic force
Tip speedm.s-1velocity of the tip of the blades. Calculated based on the RPM and the blade length
1P (one revolution)stime it tales for the rotor to complete one revolution. Calculated by taking the inverse of the RPM and multiplying by 60
nP (blade passing)stime it takes for a blade to pass in front of the tower. Calculated by dividing 1P by the number of blades
Azimuth angledegreesangular position of the rotor. An azimuth angle of 0 means that the blade 0 is pointing upwards
Rotation per timestepdegreeddegrees the rotor has rotated in one time step. The time step can be changed in the Analysis parameters
Wind speed at hub, magnitudem.s-1magnitude of the wind speed at the hub location
Wind speed at hubm.s-1components of the wind speed at the hub location. The components are given in the global coordinate system (see Coordinate systems)