Sensor performance is a function of the aerodynamic shape of the sensor and the torque required to turn the supporting shaft. An ability to describe the shape in terms of torque developed for various wind speeds and an ability to describe the shaft requirements in terms of torque to start it rotating might make it possible to estimate the starting performance with only a bearing shaft starting torque measurement. The potential and the problems associated with the considered technique are demonstrated with the aid of some measurements which have been conducted. A wind tunnel was used to provide known and steady wind speeds. An ability to calibrate wind sensors in the field is found to be useful to determine the condition of the bearings and other shaft loads. It is, thus, possible to obtain information concerning the threshold and low speed performance.
4th Symposium on Meteorological Observations and Instrumentation
- Pub Date:
- Wind Vanes;
- Low Speed Wind Tunnels;
- Velocity Distribution;
- Instrumentation and Photography