Cold-performance fluidic oscillator

A method of forming an oscillating spray of fluid droplets, said method comprising the steps of:

• causing a pressurized fluid to flow into an inlet,
• placing at least a pair of power nozzles downstream from said inlet and configuring said nozzles to accelerate the movement of said pressurized fluid when said fluid flows through said nozzles so as to form a jet of fluid that flows from each said power nozzle,
• using a fluid pathway to connect and allow for the flow of said fluid between said fluid inlet and said power nozzles, said pathway having a boundary surface that includes a pair of sidewalls,
• attaching an interaction chamber downstream from said nozzles and configuring said chamber to receive said jet flows from said nozzles,
• providing said chamber with a fluid outlet from which said spray exhausts from said interaction chamber, and
• using a means for increasing the instability of said flow from said power nozzles, said means situated proximate said power nozzles.

A fluid spray apparatus comprising:

• a fluidic insert that operates on pressurized fluid flowing through said insert to generate an exhaust flow in the form of an oscillating spray of fluid droplets, said insert having a fluidic circuit molded into said insert, said fluidic circuit having:
• an inlet for said pressurized fluid,
• at least a pair of power nozzles configured to accelerate the movement of said pressurized fluid that flow through said nozzles so as to form a jet of fluid that flows from each said power nozzle,
• a pathway that connects and allows for the flow of said fluid between said inlet and said power nozzles, said pathway having a boundary surface that includes a pair of sidewalls,
• an interaction chamber attached to said nozzles and which receives said jet flows from said nozzles,
• an outlet from which said spray exhausts from said interaction chamber, and
• a means for increasing the instability of said flow from said power nozzles, said means situated proximate said power nozzles.