ティーダハブつき風車の定常応答 : 一自由度解析

概要

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A mathematical one-degree-of-freedom model is presented describe approximate behaviors of teetered-hub rotor blades of horizontal axis wind turbine generators. Taking teeter rotation angle as the exclusive unknown, a single tractable equation of motion is derived. Quasi-steady blade element strip theory is applied to evaluate aerodynamic forces which accounts for boundary layer shear winds and wind speed reductions due to tower shadow. Fourier series is adopted to compute steady state response subject to aerodynamic forces on teetered rotor blades unwind or downwind of the tower. Numerical examples show that the downwind rotor undergoes heavy oscillations compared with the upwind rotor, and that the aerodynamic damping force due to teetering compensates for most of imbalances of bending moments at each upwind rotor blade root.
一般社団法人日本機械学会の論文
1989-01-25