e-Poster: Modeling of tower shadow effects on load variation of downwind turbine tower
(Room Station 2)
16 Oct 18
4:05 PM
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4:15 PM
Tracks:
Posters, Technology and Innovation
Downwind rotor is promising concept for multi megawatt class large offshore wind turbines by the advantages in safety and cost reduction. But they have risks to cause impulsive loads when one of the blades pass across the tower wake where wind speed is lower and turbulent locally. However, blade-element momentum method is the most useful tool for the design and analysis of wind turbine loads, model of the tower shadow effects is still problematic. The author reported an accurate tower shadow model, but, it requires time/cost consuming CFD for each case. Considering the situations above, a tower shadow model for tower loads is developed for BEM using lifting line theory. The formulation shows it does not require any empirical parameter. And, it is shown to be quite accurate on the tower section in front of the center and the outboard blade sections by the comparison with the wind turbine CFD at rated and cut out wind speed conditions.