Experimental and simulated control of lift using trailing edge devices

The Science of Making Torque from Wind 2012

Cooperman, A.^1 ; Blaylock, M.^1 ; Van Dam, C.P.^1

Mechanical and Aerospace Engineering Department, University of California, Davis, United States^1

关键词: Free-stream velocity;    Lift coefficient;    Lift force;    Micro-jet;    Naca 0012;    Trailing edges;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/555/1/012019/pdf
DOI  :  10.1088/1742-6596/555/1/012019

来源: IOP

【 摘 要 】

Two active aerodynamic load control (AALC) devices coupled with a control algorithm are shown to decrease the change in lift force experienced by an airfoil during a change in freestream velocity. Microtabs are small (1% chord) surfaces deployed perpendicular to an airfoil, while microjets are pneumatic jets with flow perpendicular to the surface of the airfoil near the trailing edge. Both devices are capable of producing a rapid change in an airfoil's lift coefficient. A control algorithm for microtabs has been tested in a wind tunnel using a modified S819 airfoil, and a microjet control algorithm has been simulated for a NACA 0012 airfoil using OVERFLOW. In both cases, the AALC devices have shown the ability to mitigate the changes in lift during a gust.