Abstract

In this paper the dynamics of a two-bladed turbine is investigated numerically as well as experimentally with respect to how the turbine frequencies change with the rotor speed. It is shown how the turbine frequencies of a two-bladed rotor change with the azimuthal position at standstill and how the frequencies start whirling during rotor rotation. The whirling for two-bladed rotors change with multiple P contributions and not only ± 1P as is previously seen for three-bladed wind turbine rotors. A three-bladed turbine was also analyzed in similar way and results were compared. This turbine was investigated both in a perfect isotropic condition where all blades have identical properties as well as an imbalanced edition where one blade had increased mass.

Keywords:
accelerometer, renewable energy, contribution, hansen, rotor speed, campbell diagram, rotor, larsen, configuration, symmetric flap mode 1st
Subjects:
Drillstring Design
This content is only available via PDF.
2015. International Society of Offshore and Polar Engineers
You can access this article if you purchase or spend a download.