Atmospheric Testing of Wind Turbine Trailing Edge Aerodynamic Brakes

摘要

An experimental investigation was conducted using an instrumented horizontal-axis wind turbine that incorporated variable span trailing-edge aerodynamic brakes. A primary goal was to directly compare study results with (infinite-span) wind tunnel data and to provide information on how to account for device span effects during turbine design or analysis. Comprehensive measurements were utilized to define effective hcanges in the aerodynamic coefficients, as a function of angle of attack and control deflection, for three device spans and configurations. Differentces in the lift and drag behavior are most pronounced near stall and for device spans of less thant 15