High-momentum novel and conventional actuators jets were used to enhance the mixing of a high speed large-scale round jet. The comparation of the blowing jet on streamwise vortices

flapping and interaction area between the novel and conventional actuators was studied. The jet mixing enhancement flow hysteresis was analyzed. Results show that the novel actuator is superior to the conventional actuator in terms of the blowing period

blowing momentum

peak jet momentum ratio. The jet mixing enhancement hysteresis consists of the actuator hysteresis and flow field hysteresis. Both the conventional actuator and novel actuator peak jet momentum lags behind the piston peak movement speed by 19.5%

and the actuator peak momentum lags behind the flow field about 5%. Compared with the conventional actuator

the interaction area of the novel actuator fluid tab is larger

leading to a better jet mixing enhancement effect.