High-frequency pulsed co-axial injector system and method for high-speed flow mixing and control

An injection system, comprising:

• a Resonance Enhanced Microjet (REM) nozzle assembly, comprising:
• a plurality of plates including a top plate and a bottom plate,
• a first inlet formed in the top plate and coupled to a steady jet from a source nozzle,
• the bottom plate including a hollow cavity having a bottom surface,
• a tube fixedly coupled within the bottom plate and within the hollow cavity to form a first outlet flush with an exit side of the bottom plate that exits a supersonic pulsed actuation jet, the first inlet and the first outlet being fluid coupled together,
• a second outlet in the bottom plate and positioned concentric about the tube to form a circular slit around the tube, the circular slit being directly fluidly coupled to the bottom surface of the hollow cavity to produce a co-axial annular jet, and
• a second inlet via a conduit coupled to a secondary fluid stream source and the hollow cavity;
• wherein the first outlet and the circular slit are constructed and arranged to effectuate a plurality of different mixing mechanisms between the co-axial annular jet emitted from the circular slit and the supersonic pulsed actuation jet emitted from the first outlet.