Measurement of high solidity vertical axis wind turbine aerodynamic loads under high vibration response conditions

Darrieus vertical axis wind turbine: Basic research methods

“…The study showed that airfoil motion had significant effects on pressure distribution over the airfoil surface and led to formation and shedding of the vortex. Meanwhile, McLaren [68] carried out a series of complete experimental wind tunnel tests to measure aerodynamic loading of an H-type wind turbine rotor under a series of vibrations and vibration isolation condition, respectively. The study showed that large vibration response resulted in conditions that made it difficult or impossible to measure the underlying aerodynamic loading.…”

A simplified dynamic model for mast design of H-Darrieus vertical axis wind turbines (VAWTs)

“…Recently, an article describing the aerodynamic load measurements on the airfoils of VAWTs has been published [13]. High amplitude vibration of the turbine was observed, primarily due to the resonance of the whirling mode of the turbine.…”

“…Vibration should be minimised to reduce the potential noise impact and potential fatigue failure. Adding a guy wire system at the top of the turbine increases the primary structural mode because of the increased energy required to excite the primary mode of the fixed-pinned shaft [13].…”

“…The computational fluid dynamics (CFD) model developed in [13] can be used to determine the thrust and radial loading characteristics for one blade depending on the angle of rotation and for different blade speeds. It was shown that the resultant force is harmonic in both the stream-wise and cross-stream direction.…”

“…The lateral force produces an overturning moment on the mast which is the critical loading driving its static design. The helically swept blades of the Quiet Revolution wind turbine reduce the variation in lateral loading which was a typical issue with the Darrieus Turbine as discussed in [13].…”