WIND TURBINE BLADE INCLUDING AIR LEAKAGE GUARD

摘要

PROBLEM TO BE SOLVED: To provide a wind turbine blade capable of reducing air leakage between an inner blade section and an outer blade section, and to provide a quick and simple method for maintaining an aerodynamic effect of the wind turbine blade while reducing air leakage within a normal pitch range.SOLUTION: A wind turbine includes at least one wind turbine blade 5 having an inner blade section 6 and an outer blade section 7 separated by a pitch junction 8. A first seal element 13 is disposed to cover an air gap of the pitch junction at a positive pressure side of the blade sections. At least one second seal element is disposed at a negative pressure side of at least one of the blade sections. The first and second seal elements act as air barrier when a pitch angle of the outer blade section changes to a set pitch angle or less, and prevent air leakage from the positive pressure side to the negative pressure side.SELECTED DRAWING: Figure 2