| 摘要 |
Methods and apparatus for optically detecting an angle of attack for an airfoil using light detection and ranging (LIDAR). To determine the angle of attack, one or more light beam pulses may be emitted from the leading edge of the airfoil into an (apparently) flowing fluid at various emission angles. The emitted pulses may be backscattered by particles in the fluid, and the backscattered light may be received by a detector at the airfoil. By range gating the returning pulses of backscattered light, a fluid velocity may be determined for each of the emission angles. The angle of attack is identified as the emission angle corresponding to the maximum velocity. A parameter (e.g., pitch or speed) of the airfoil may be controlled based on the angle of attack. In this manner, the airfoil may be manipulated or the shape of the airfoil may be adjusted for increased performance or efficiency.
|
