Experimental Determination of the Hydrodynamic Loading on Vertical-Axis Cross-flow Tidal Turbines with Blade Embedded Autonomous Sensors
Résumé
Hydrokinetic vertical-axis cross-flow turbines (CFTT) can efficiently harness tidal and ocean currents but are prone to vibrations and fatigue due to complex flow dynamics, especially at low rotational speeds where blade stall occurs. To study these effects, a lab-scale rotor was developed with strain gauges on the support structure and embedded miniaturized sensors in the blades. These sensors measure accelerations, rotational speed, pressure, and magnetic fields, capturing blade bending, torsion, and overall rotor motion. They can be calibrated in situ and can serve as a plug-and-play system for advanced rotor monitoring in future designs.
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