Fluid oscillator

A fluidic oscillator comprising in combination a power nozzle for issuing a stream of fluid under pressure,

• a barrier member in the path of said fluid stream for temporarily dividing said fluid stream into a pair of secondary fluid streams,
• a closed surface including as a part thereof the surface of said barrier member,
• said closed surface having means for forming a pair of control vortices to each side of said power stream, respectively, to alternately pulsate and control the direction of fluid flow with respect to said barrier means, and
• a pair of outlet means through which said fluid stream alternately pass.

A fluid oscillator comprising:

• nozzle means for forming and issuing a jet of fluid in response to application thereto of fluid under pressure;
• an oscillation chamber having means forming inlet and outlet openings therein, said oscillation chamber being positioned to receive said jet of fluid from said nozzle means through said inlet opening, said oscillation chamber including:
• oscillation means within said chamber for cyclically oscillating said jet back and forth across said chamber in a direction substantially transverse to the direction of flow in said jet, said oscillation means including impingement means disposed in said oscillation chamber in the path of said jet, for forming, on each side of said jet, vortices of said jet of fluid which alternate in both strength and chamber position in phase opposition, said impingement means comprising a far wall of said chamber remote from said inlet opening;
• flow directing means for directing fluid from the cyclically oscillated jet out of said chamber through means forming a pair of outlet passages leading to said outlet opening,
• said nozzle means being positioned to issue said jet generally radially across said oscillation chamber towards said impingement means,
• said outlet passages being defined as spaces between opposing walls of said chamber and said far wall, and said inlet opening,
• said means forming said outlet opening being constituted by a first of said pair of outlet passages positioned at one side of said nozzle means to receive fluid flowing to said outlet opening along said one side of said jet, and
• a second of said pair of outlet passage positioned at the opposite side of said nozzle means to receive fluid flowing to said outlet opening along the opposite side of said jet.