Investigation of velocity fields of rotor wake for hover mode
In this work, experimental study results of velocity field measurements in the vicinity of tip regions of rotor blades are presented for hover mode. The measurements were obtained using stereo PIV Dantec system.
Obtained velocity fields were used to idenify vortex core shapes in the first approximation using four intermediate points. Due to unsymmetrical nature of the vortex cores, their radii were determined from equivalent circles, which had same area as the obtained closed loop of the vortex shape.
Also, the trajectory of the vortices in the rotor wake is presented.