Manipulation of ramp-induced shock wave/boundary layer interaction using a transverse plasma jet array

The unsteadiness of ramp-induced shock wave/boundary layer interaction under the disturbance of an array of plasma jets was experimentally investigated using high-speed Schlieren imaging. The plasma jet was created by arc discharge in a confined small cavity, with a volume of 50 mm3. The boundary layer thickness at the position where the upstream array of the actuators locates is δ = 2.11 mm. Two jet orifices with a diameter of D = 1 mm, 2 mm (δ/D = 2.11, 1.05) are designed. The multichannel discharge circuit was used to extend the spanwise disturbance region of the jets. The size of separation zone was reduced when interacting with the plasma jet plume. Meawhile, an upstream motion of the separation shock and reattachment shock is observed during the recompression process caused by the obstruction and accumulation of the jets.