WIND TURBINE BLADE WITH TRIPPING DEVICE AND METHOD THEREOF
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United States of America Patent
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Issued Date -
Feb 23, 2017
app pub date -
Jul 22, 2016
filing date -
Aug 19, 2015
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Abstract
A wind turbine and a method of reducing extreme loads and fatigue loads on a wind turbine by using a passively activated tripping device arranged on the pressure side of the wind turbine blade. The tripping device is configured to interrupt the passing airflow, when activated, and transform the airflow into a turbulent airflow. The tripping device is positioned close to the leading edge, wherein its dimensions are optimized so that it reduces the maximum lift coefficient as well as increases the minimum lift coefficient which in turn reduces the range of the lift coefficient. The tripping device is activated at both negative and positive angle-of-attacks outside the normal operating range.
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