Abstract
Newly developed ring-type dielectric barrier discharge(DBD) plasma actuators were used for the active control of the tip leakage flow of an axial-flow turbine rotor. Hot-wire anemometry was used to obtain the turbulence intensity distributions at the annular turbine rotor exit at various input voltages. The plasma lighting in the tip clearance region rotated with the motion of tip of the turbine rotor. The high turbulence intensity region near the tip endwall due to the tip leakage flow was reduced by the active control using the ring-type plasma actuator.
