Fluidic nozzle and improved moving vortex generating fluidic oscillator

A moving vortex-generating fluidic oscillator circuit configured to generate an oscillating pattern of fluid droplets, comprising:

• a fluidic oscillator inlet adapted for fluid communication with a source of pressurized fluid, and a power nozzle where said inlet and said power nozzle are aligned along a central fluid flow path axis;
• said oscillator further including an oscillation chamber having an upstream end with an inlet coupled to said power nozzle for issuing a jet of fluid into said oscillation chamber, and a downstream end having an outlet aperture for issuing a jet of fluid into ambient space;
• wherein said oscillation chamber has a vortex generating fluid jet steering section in fluid communication with said power nozzle and having first and second symmetrically diverging sidewalls defining first and second vortex circulation generating set back features;
• said first vortex circulation generating set back feature diverging and then converging relative to said flow path axis in a downstream direction and configured to generate a first periodically varying vortex having a first circulation orientation, and said second vortex circulation generating set back feature diverging and then converging relative to said flow path axis and configured to generate a second periodically varying vortex having a second circulation orientation alternately with said first vortex, wherein said second vortex circulation orientation opposes the first vortex circulation orientation;
• wherein said fluid jet steering section is in fluid communication with and is configured to emit said jet of fluid as a laterally oscillating fluid jet into an oscillation inducing interaction region with downstream diverging sidewalls;
• and
• wherein said opposing first and second sidewalls are configured to intersect opposing top and bottom walls to define said oscillation inducing interaction region in said oscillation chamber to cause said first and second vortices to alternately move distally and proximally in phase opposition to cause said jet of fluid to rhythmically sweep back and forth between said sidewalls in said oscillation chamber.