In this work, experimental results of rotor wake in hover mode are presented.The experiments were carried out with a rotor rig model in the T-1K wind tunnel Repair Service in Kazan National Research Technical University (Kazan Aviation Institute).The rotor consisted of four identical blades.
The Q-criterion was used to identify tip vortices for a 2D case.The results were then compared with two different Seifen wake models.