Low cost, low pressure, feedback passage-free fluidic oscillator with stabilizer

A low pressure fluidic oscillator which is free of feedback passages, comprising:

• an oscillation chamber having a length greater than its width, a pair of mutually facing and complementary-shaped sidewalls and planar top and bottom walls, first and second end walls, oscillation stabilization means in said oscillation chamber,
• means forming an input power nozzle in said first end wall having a width W and a depth D, for issuing a stream of fluid into said oscillation chamber, and form alternately pulsating, cavitation-free vortices in said oscillation chamber on each side of said stream,
• an outlet opening formed in said second end wall and axially aligned with said power nozzle and a width and depth such that internal pressure in said chamber is greater than ambient,
• a pair of short sidewalls diverging in a downstream direction from said outlet opening, and wherein said complementary-shaped sidewalls are straight and said stabilization means are ribs formed on open of said top and bottom walls.

A low pressure fluidic oscillator which is free of feedback passages, comprising:

• an oscillation chamber having a length greater than its width, a pair of mutually facing and complementary-shaped sidewalls and planar top and bottom walls, first and second end walls, oscillation stabilization means in said oscillation chamber,
• means forming an input power nozzle in said first end wall having a width W and a depth D, for issuing a stream of fluid into said oscillation chamber, and form alternately pulsating, cavitation-free vortices in said oscillation chamber on each side of said stream,
• an outlet opening formed in said second end wall and axially aligned with said power nozzle and a width and depth such that internal pressure in said chamber is greater than ambient,
• a pair of short sidewalls diverging in a downstream direction from said outlet opening, and wherein said complementary-shaped sidewalls are straight and diverge from each other in the direction of said outlet opening and said stabilization means is constituted by one or more ribs on one of said top and bottom walls.