Measurments of the velocity and turbulence structure of a rotor tip vortex

摘要

The turbulent flow structure of a tip vortex generated by a hovering rotor was investigated with the use of three-dimensional laser Doppler velocimetry. The velocity field was measured at five wake ages, with the three components of turbulence being measured at the three earliest ages. The tangential (swirl) velocity component inside the tip vortex was found to have a self-similar behavior for all wake ages.