Strain gauge measurements on a full scale tidal turbine blade

The development of tidal energy converters, and particularly floating is an area increased in recent years. Testing a device over winter 2017/18 led to opportunity record examine strain full scale composite turbine blade under operational conditions, with comparison generating parked behaviours. Comparison the recorded data shows that correlates well both torque thrust averaging periods specified IEC62600-200, although examination frequency spectra generated from show higher fluctuations are not necessarily detectable larger recordings this particular measurement arrangement. need for synchronised clocks on recording systems also highlighted, along cross-correlation method used recover alignment different allow between them similar order magnitude clock skew systems. • Blade compared two 10 min averages. Clock causes inaccurate short term results, but recoverable post-processing. No significant difference results calculated using or Time delay measurements separated velocity stream line can be corrected. Torque strain; power rpm could predict fatigue.