Variable characteristics fluidic oscillator and fluidic oscillator with three dimensional output jet and associated methods

Patent metadata

Field	Value
Publication number	US-12453977-B2
Application number	US-202418595857-A
Country	US
Kind code	B2
Filing date	Mar 5, 2024
Priority date	Nov 28, 2017
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

Various implementations include a fluidic oscillator having at least one control port. The at least one control port is for introducing a control fluid into the fluidic oscillator or suctioning the fluid stream from the fluidic oscillator. The introduction of a control fluid into the fluidic oscillator or suction of the fluid stream from the fluidic oscillator alters the frequency and sweeping angle of the oscillating fluid stream as it exits the fluidic oscillator. Various other implementations include a fluidic oscillator having a first control port defined by the first portion of the outlet nozzle and a second control port defined by the second portion of the outlet nozzle. The introduction of a control fluid into the fluidic oscillator or suction of the fluid stream from the fluidic oscillator through the control ports alters the exit angle of the oscillating fluid stream as it exits the fluidic oscillator.

First claim

What is claimed is:

1 . A feedback-type fluidic oscillator, the fluidic oscillator comprising:
a first portion, a second portion, and a middle portion coupled between the first portion and the second portion, the middle portion comprising:
an interaction chamber having a first attachment wall and a second attachment wall opposite and spaced apart from the first attachment wall,
a fluid supply inlet for introducing a fluid stream into the interaction chamber,
a single outlet nozzle downstream of the fluid supply inlet, wherein the fluid stream exits the interaction chamber through the single outlet nozzle,
a first feedback channel coupled to the first attachment wall and a second feedback channel coupled to the second attachment wall, the first feedback channel and the second feedback channel being in fluid communication with the interaction chamber, each of the first feedback channel and the second feedback channel having a first end, a second end opposite and spaced apart from the first end, and an intermediate portion disposed between the first end and the second end, wherein the first end is adjacent the single outlet nozzle and the second end is adjacent the fluid supply inlet, wherein the first attachment wall and the second attachment wall of the interaction chamber are shaped to allow fluid from the fluid stream to flow into the first ends of the first feedback channel and the second feedback channel, respectively, causing the fluid stream to oscillate between the first attachment wall and the second attachment wall of the interaction chamber; and
at least one control port defined by a recessed channel within a wall of the middle portion of the fluidic oscillator, the at least one control port having a flow direction, the at least one control port for introducing a control fluid into the fluidic oscillator in the flow direction of the at least one control port or suctioning the fluid stream from the fluidic oscillator in the flow direction of the at least one control port, wherein, when the introduction of the control fluid, or the suction of the fluid stream, in the flow direction of the at least one control port is varied, an oscillation frequency and a sweeping angle of the fluid stream exiting the single outlet nozzle is varied for a given flow rate,
wherein the fluidic oscillator has a central axis extending from the fluid supply inlet to the single outlet nozzle.

2 . The fluidic oscillator of claim 1 , wherein the at least one control port comprises a first control port and a second control port.

3 . The fluidic oscillator of claim 2 , wherein the first control port is defined by the first attachment wall and the second control port is defined by the second attachment wall.

4 . The fluidic oscillator of claim 3 , wherein the flow directions of the first and second control ports are oriented toward the single outlet nozzle and angled away from the central axis.

5 . The fluidic oscillator of claim 3 , wherein the flow directions of the first and second control ports are oriented toward the single outlet nozzle and parallel to the central axis.

6 . The fluidic oscillator of claim 3 , wherein the flow directions of the first and second control ports are oriented toward the single outlet nozzle and angled toward the central axis.

7 . The fluidic oscillator of claim 3 , wherein the flow directions of the first and second control ports are oriented toward the fluid supply inlet and angled toward the central axis.

8 . The fluidic oscillator of claim 2 , wherein the first control port is defined by a wall of the first feedback channel and the second control port is defined by a wall of the second feedback channel.

9 . The fluidic oscillator of claim 2 , wherein the first control port is defined by a wall of the interaction chamber disposed between the first end of the first feedback channel and the single outlet nozzle and the second control port is defined by a wall of the interaction chamber disposed between the first end of the second feedback channel and the single outlet nozzle.

10 . A feedback-type fluidic oscillator, the fluidic oscillator comprising:
a first portion, a second portion, and a middle portion coupled between the first portion and the second portion, the middle portion comprising:
an interaction chamber having a first attachment wall and a second attachment wall opposite and spaced apart from the first attachment wall,
a fluid supply inlet for introducing a fluid stream into the interaction chamber,
a single outlet nozzle downstream of the fluid supply inlet, wherein the fluid stream exits the interaction chamber through the single outlet nozzle,
a first feedback channel coupled to the first attachment wall and a second feedback channel coupled to the second attachment wall, the first feedback channel and the second feedback channel being in fluid communication with the interaction chamber, each of the first feedback channel and the second feedback channel having a first end, a second end opposite and spaced apart from the first end, and an intermediate portion disposed between the first end and the second end, wherein the first end is adjacent the single outlet nozzle and the second end is adjacent the fluid supply inlet, wherein the first attachment wall and the second attachment wall of the interaction chamber are shaped to allow fluid from the fluid stream to flow into the first ends of the first feedback channel and the second feedback channel, respectively, causing the fluid stream to oscillate between the first attachment wall and the second attachment wall of the interaction chamber; and
at least one control port having a flow direction, wherein the at least one control port is defined by the first portion or the second portion of the fluidic oscillator, the at least one control port for introducing a control fluid into the fluidic oscillator in the flow direction of the at least one control port or suctioning the fluid stream from the fluidic oscillator in the flow direction of the at least one control port, wherein, when the introduction of the control fluid, or the suction of the fluid stream, in the flow direction of the at least one control port is varied, an oscillation frequency and a sweeping angle of the fluid stream exiting the single outlet nozzle is varied for a given flow rate,
wherein the fluidic oscillator has a central axis extending from the fluid supply inlet to the single outlet nozzle.

11 . The fluidic oscillator of claim 10 , wherein the at least one control port is a circular-shaped control port defined by the first portion of the fluidic oscillator.

12 . The fluidic oscillator of claim 10 , wherein the at least one control port comprises a first control port and a second control port.

13 . The fluidic oscillator of claim 12 , wherein the first and second control ports are defined by the first portion and are in direct fluid communication with the interaction chamber.

14 . The fluidic oscillator of claim 12 , wherein the first control port is defined by the first portion and the second control port is defined by the second portion, the flow direction of the first control port being coincident with, and opposite, the flow direction of the second control port.

Assignees

• Ohio State Innovation Foundation

Inventors

• Tomac Mehmet
• Gregory James

Classifications

• F15C1/22

  Oscillators · CPC title

• B05B1/10

  in the form of a fine jet, e.g. for use in wind-screen washers · CPC title

• B05B1/08 Primary

  of pulsating nature, e.g. delivering liquid in successive separate quantities · CPC title