A fluidic oscillator (100, 200 or 300) operating on a pressurized fluid flowing therethrough to generate an exhaust flow in the form of an oscillating spray of fluid droplets, said oscillator comprising: an inlet for said pressurized fluid, first, second and third power nozzles, each of which having a floor and sidewalls that are configured to accelerate the movement of said pressurized fluid that flows through said first, second and third power nozzles to form a jet of fluid that flows from each said power nozzle, a fluid communication pathway that connects and allows for the flow of said fluid between said inlet and said first, second and third power nozzles, said fluid communication pathway having a boundary surface that includes a pair of sidewalls, and an interaction chamber (118, 218, 318) in fluid communication with said first, second and third power nozzles which receives first, second and third jet flows from said first, second and third power nozzles; said interaction chamber (118, 218, 318) having a floor, an outlet orifice (120, 220 320) from which said spray exhausts from said interaction chamber, and an upwardly projecting island protuberance (126, 226, 326) defining first, second and third island wall segments projecting upwardly from said chamber floor in a position which is impacted by said first, second and third jets from first, second and third power nozzles, wherein said upwardly projecting island protuberance is spaced from but aligned along a common axis (102, 202, 302) with said outlet orifice within said interaction chamber; and wherein said first and second jets (J1, J2) are aligned along first and second jet axes which intersect at a Jet intersection angle, J A which is in the range of 100 to 140 degrees, wherein said interaction chamber defines an interaction region configured to initiate internal vortices in laterally spaced vortex generating areas which are upstream of the island protuberance (126, 226, 326) wherein said vortices are forced distally or downstream and shed on alternating sides of the island protuberance (126, 226, 326), wherein said interaction chamber's first, second and third power nozzles are defined between the interaction chamber's opposing left and right side walls and first and second inverted bowl shaped wall segments; wherein said first bowl-shaped wall segment provides a first or left side vortex generating area which is upstream of or above and to the left of said island and said second bowl-shaped wall segment provides a mirror image or right side vortex generating area which is upstream of or above and to the right of said island; and wherein symmetrical left and right side vortex generation areas are configured to generate and contain laterally offset fluid vortices upstream of the island protuberance (126, 226, 326). an inlet for said pressurized fluid, first, second and third power nozzles, each of which having a floor and sidewalls that are configured to accelerate the movement of said pressurized fluid that flows through said first, second and third power nozzles to form a jet of fluid that flows from each said power nozzle, a fluid communication pathway that connects and allows for the flow of said fluid between said inlet and said first, second and third power nozzles, said fluid communication pathway having a boundary surface that includes a pair of sidewalls, and an interaction chamber (118, 218, 318) in fluid communication with said first, second and third power nozzles which receives first, second and third jet flows from said first, second and third power nozzles; said interaction chamber (118, 218, 318) having a floor, an outlet orifice (120, 220 320) from which said spray exhausts from said interaction chamber, and an upwardly projecting island protuberance (126, 226, 326) defining first, second and third island wall segments projecting upwardly from said chamber floor in a position which is impacted by said first, second and third jets from first, second and third power nozzles, wherein said upwardly projecting island protuberance is spaced from but aligned along a common axis (102, 202, 302) with said outlet orifice within said interaction chamber; and wherein said first and second jets (J1, J2) are aligned along first and second jet axes which intersect at a Jet intersection angle, J A which is in the range of 100 to 140 degrees, wherein said interaction chamber defines an interaction region configured to initiate internal vortices in laterally spaced vortex generating areas which are upstream of the island protuberance (126, 226, 326) wherein said vortices are forced distally or downstream and shed on alternating sides of the island protuberance (126, 226, 326), wherein said interaction chamber's first, second and third power nozzles are defined between the interaction chamber's opposing left and right side walls and first and second inverted bowl shaped wall segments; wherein said first bowl-shaped wall segment provides a first or left side vortex generating area which is upstream of or above and to the left of said island and said second bowl-shaped wall segment provides a mirror image or right side vortex generating area which is upstream of or above and to the right of said island; and wherein symmetrical left and right side vortex generation areas are configured to generate and contain laterally offset fluid vortices upstream of the island protuberance (126, 226, 326).