Phase tailoring for resonant flow devices

Patent metadata

Field	Value
Publication number	US-10662987-B2
Application number	US-201916671367-A
Country	US
Kind code	B2
Filing date	Nov 1, 2019
Priority date	Nov 6, 2016
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

A device including a resonant array of a plurality of synthetic jet generators where neighboring jet generators are coupled, resulting in the potential for constructive and destructive interference between jets of the plurality of synthetic jet generators depending on the relative phase of a corresponding plurality of drive signals to plurality of synthetic jet generators. The device also includes a controller configured to control the relative phase of the corresponding plurality of drive signals to effect a change in a first jet emitted by a first synthetic jet generator of the plurality of synthetic jets by changing a given phase of a second jet emitted by a second synthetic jet generator of the plurality of synthetic jet generators.

First claim

What is claimed is:

1. A device comprising:
a resonant array of a plurality of synthetic jet generators where neighboring jet generators are coupled; and
a controller configured to control a relative phase of a corresponding plurality of drive signals to effect a change in a first jet emitted by a first synthetic jet generator of the plurality of synthetic jet generators by changing a given phase of a second jet emitted by a second synthetic jet generator of the plurality of synthetic jet generators, wherein the given phase is different from a phase of the first jet emitted by the first synthetic jet generator of the plurality of synthetic jet generators.

2. The device of claim 1 , wherein the given phase is configured to cause a larger amplitude in each of the jets than is possible with a single jet.

3. The device of claim 1 , wherein a resulting velocity profile of the jets is shaped depending on the relative phases to each jet generator of the plurality of synthetic jet generators.

4. The device of claim 1 , wherein the second jet will only change when the first synthetic jet generator is driven.

5. The device of claim 1 further comprising:
an aircraft connected to the plurality of synthetic jet generators; and
a sensor connected to the aircraft and configured to detect local aerodynamic stall characteristics of a fluid flow on a body of the aircraft, and wherein the controller is further configured to adjust the first jet by changing a phase angle of the second jet generator to mitigate the local aerodynamic stall characteristics.

6. The device of claim 1 , wherein the controller is further configured to control operation of the first synthetic jet generator of the plurality of synthetic jet generators by controlling only a relative phase difference between the corresponding plurality of drive signals.

7. The device of claim 1 further comprising:
a feedback circuit coupled to the first synthetic jet generator of the plurality of synthetic jet generators, the second synthetic jet generator of the plurality of synthetic jet generators, and the controller, and wherein the controller is further configured to use a feedback signal from the feedback circuit to control the first synthetic jet generator of the plurality of synthetic jet generators and the second synthetic jet generator of the plurality of synthetic jet generators to produce a predetermined velocity profile of a combination of the first synthetic jet of the plurality of synthetic jet generators and the second synthetic jet of the plurality of synthetic jet generators.

8. The device of claim 7 further comprising:
a housing containing the first synthetic jet generator of the plurality of synthetic jet generators, the second synthetic jet generator of the plurality of synthetic jet generators, and the controller;
an aircraft connected to the housing; and
a sensor connected to the aircraft and configured to detect local aerodynamic stall characteristics of a fluid flow on a body of the aircraft, and wherein the controller is further configured to mitigate the local aerodynamic stall characteristics by producing the predetermined velocity profile.

9. The device of claim 1 , wherein the controller is further configured to drive both the first synthetic jet generator of the plurality of synthetic jet generators and the second synthetic jet generator of the plurality of synthetic jet generators at a single constant voltage amplitude.

10. The device of claim 1 , wherein the controller is further configured to increase both a first maximum velocity of the first synthetic jet of the plurality of synthetic jet generators and a second maximum velocity of the second synthetic jet of the plurality of synthetic jet generators by changing a relative phase difference between the corresponding plurality of drive signals.

11. A system for phase tailoring resonant flow devices, comprising:
a data processing system using a controller configured to:
transmit a first drive signal to a first synthetic jet generator to produce a first synthetic jet;
transmit a second drive signal to a second synthetic jet generator to produce a second synthetic jet; and
control a combined operation of the first synthetic jet and the second synthetic jet by adjusting a phase difference between the first drive signal and the second drive signal.

12. The system of claim 11 , wherein the controller is further configured to control operation of the first synthetic jet generator by controlling only the phase difference.

13. The system of claim 11 , wherein the controller is further configured to produce a predetermined velocity profile of a combination of the first synthetic jet and the second synthetic jet using a feedback signal from a feedback circuit, the feedback circuit coupled to the first synthetic jet generator, the second synthetic jet generator, and the controller.

14. The system of claim 11 , wherein the controller is further configured to:
detect, using a sensor connected to an aircraft, local aerodynamic stall characteristics of a fluid flow on a body of the aircraft; and
mitigate, using a combined operation of the first synthetic jet and the second synthetic jet, the local aerodynamic stall characteristics by producing the predetermined velocity profile.

15. The system of claim 11 , wherein the controller is further configured to drive both the first synthetic jet generator and the second synthetic jet generator at a single constant voltage amplitude.

16. The system of claim 11 , wherein the controller is further configured to increase both a first maximum velocity of the first synthetic jet and a second maximum velocity of the second synthetic jet by changing the phase difference.

17. A computer program product for training a primary machine learning model, the computer program product comprising:
a computer-readable storage media;
first program code, stored on the computer-readable storage media, for generating a first synthetic jet using a first synthetic jet generator;
second program code, stored on the computer-readable storage media, for generating a second synthetic jet using a second synthetic jet generator that is coupled to the first synthetic jet generator;
third program code, stored on the computer-readable storage media, for controlling, using a controller coupled to both the first synthetic jet generator and the second synthetic jet generator, the first synthetic jet and the second synthetic jet.

18. The computer program product of claim 17 , wherein the third program code comprises:
program code, stored on the computer-readable storage media, for transmitting a first drive signal to the first synthetic jet generator;
program code, stored on the computer-readable storage media, for transmitting a second drive signal to the second synthetic jet generator; and
program code, stored on the computer-readable storage media, for controlling a combined operation of the first synthetic jet and the second synthetic jet by adjusting a phase difference between the first drive signal and the second drive signal.

19. The computer program product of claim 17 , further comprising:
fourth program code, stored on the computer-readable storage media, for producing a predetermined velocity profile of a combination of the first synthetic jet and the second synthetic jet using a feedback signal from a feedback circuit, the feedback circuit coupled to the first synthetic jet generator, the second synthetic jet generator, and the controller.

20. The computer program produ

Assignees

• Boeing Co

Inventors

• Brzozowski Daniel Paul
• Griffin Steven Fulton

Classifications

• F15D1/0095 Primary

  by means of injecting jet pulses of fluid wherein the injected fluid is taken from the fluid and re-injected again, e.g. synthetic jet actuators (F15D1/008 takes precedence) · CPC title

• B64C2230/04

  by actively generating fluid flow · CPC title

• B64D43/02

  for indicating aircraft speed or stalling conditions · CPC title

• B64C2230/18

  by using small jets that make the fluid flow oscillate · CPC title

• B64C21/08

  adjustable · CPC title