Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 11, 2020 - November 13, 2020
In order to explain the phase-synchronization of the blades of a vertical axis wind turbine (VAWT) pair, which had been observed both in the wind tunnel experiments and in the computational fluid dynamics (CFD) analysis, a mathematical model that considers the pressure fluctuation due to the interaction of blades is proposed in this study. The analysis using the model shows that the phase-synchronization can occur with the same synchronous angular velocity in the two symmetric arrangements even without considering the induced velocity caused by the rotation of VAWT rotors and that the fluctuation period of the angular velocity becomes longer as the interaction increases. Furthermore, when the effect of the induced velocity is added, the model calculation gives the result which is qualitatively consistent with the gap dependence of the synchronous angular velocity observed in the experiments and CFD.
