Acoustic control of an electrodynamic combustion system

Patent metadata

Field	Value
Publication number	US-9605849-B2
Application number	US-201615063945-A
Country	US
Kind code	B2
Filing date	Mar 8, 2016
Priority date	Jul 31, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A system is configured to apply a voltage, charge, and/or an electric field to a combustion reaction responsive to acoustic feedback from the combustion reaction.

First claim

What is claimed is:

1. A method for controlling application of electricity to a combustion reaction, comprising:
applying electricity to a combustion reaction;
receiving acoustic feedback from the combustion reaction via a transducer; and
modifying the electricity responsive to the acoustic feedback via a controller.

2. The method for controlling application of electricity to the combustion reaction of claim 1 , wherein the combustion reaction includes a flame.

3. The method for controlling application of electricity to the combustion reaction of claim 1 , further comprising applying an electric field proximate to the combustion reaction.

4. The method for controlling application of electricity to the combustion reaction of claim 3 , wherein the electric field is selected to interact with the voltage or the charge applied to the combustion reaction.

5. The method for controlling application of electricity to the combustion reaction of claim 1 , further comprising extracting one or more acoustic characteristics from the acoustic feedback.

6. The method for controlling application of electricity to the combustion reaction of claim 5 , wherein the one or more acoustic characteristics include one or more tones.

7. The method for controlling application of electricity to the combustion reaction of claim 6 , wherein modifying the voltage or the charge responsive to the acoustic feedback includes changing a voltage modulation frequency or a charge modulation frequency to attenuate the one or more tones.

8. The method for controlling application of electricity to the combustion reaction of claim 5 , wherein the one or more acoustic characteristics include acoustic energy magnitude.

9. The method for controlling application of electricity to the combustion reaction of claim 1 , wherein modifying the voltage or the charge responsive to the acoustic feedback includes changing electricity concentration.

10. The method for controlling application of electricity to the combustion reaction of claim 9 , wherein modifying the voltage or the charge responsive to the acoustic feedback includes compensating for a change in a combustion reaction volume, an air flow rate, or a fuel flow rate.

11. The method for controlling application of electricity to the combustion reaction of claim 1 , wherein modifying the voltage or the charge responsive to the acoustic feedback includes changing a waveform shape corresponding to the voltage or the charge.

12. The method for controlling application of electricity to the combustion reaction of claim 1 , further comprising selecting a characteristic of electricity applied to the combustion reaction responsive to the acoustic feedback.

13. The method for controlling application of electricity to the combustion reaction of claim 12 , further comprising:
determining if the selected characteristic of the voltage or the charge applied to the combustion reaction is different from a present characteristic of the voltage or the charge applied to the combustion reaction; and
modifying the voltage or the charge responsive to the acoustic feedback when the selected characteristic is different from the present characteristic.

14. The method for controlling application of electricity to the combustion reaction of claim 1 , wherein the voltage or the charge includes a time-varying voltage or a time-varying charge.

15. The method for controlling application of electricity to the combustion reaction of claim 1 , wherein the step of applying electricity to a combustion reaction further comprises applying an electric field proximate to the combustion reaction.

16. The method for controlling application of electricity to the combustion reaction of claim 15 , wherein the combustion reaction includes a flame.

17. The method for controlling application of electricity to the combustion reaction of claim 15 , further comprising applying a voltage or a charge to the combustion reaction.

18. The method for controlling application of electricity to the combustion reaction of claim 17 , wherein the electric field is selected to interact with the voltage or the charge applied to the combustion reaction.

19. The method for controlling application of electricity to the combustion reaction of claim 15 , further comprising extracting one or more acoustic characteristics from the acoustic feedback.

20. The method for controlling application of electricity to the combustion reaction of claim 19 , wherein the one or more acoustic characteristics include one or more tones.

21. The method for controlling application of electricity to the combustion reaction of claim 20 , wherein modifying the electric field responsive to the acoustic feedback includes changing a voltage modulation frequency to attenuate the one or more tones.

22. The method for controlling application of electricity to the combustion reaction of claim 19 , wherein the one or more acoustic characteristics include an acoustic energy magnitude.

23. The method for controlling application of electricity to the combustion reaction of claim 15 , wherein modifying the electric field responsive to the acoustic feedback includes changing a voltage magnitude.

24. The method for controlling application of electricity to the combustion reaction of claim 15 , wherein modifying the electric field responsive to the acoustic feedback includes changing a waveform shape corresponding to the electric field.

25. The method for controlling application of electricity to the combustion reaction of claim 15 , wherein modifying the electric field responsive to the acoustic feedback includes changing an electrode or a location of the electrode applying the electric field.

26. The method for controlling application of electricity to the combustion reaction of claim 15 , wherein modifying the electric field responsive to the acoustic feedback includes compensating for a change in a combustion reaction volume, an air flow rate, or a fuel flow rate.

27. The method for controlling application of electricity to the combustion reaction of claim 15 , further comprising determining a desired characteristic of an electric field applied proximate to the combustion reaction responsive to the acoustic feedback.

28. The method for controlling application of electricity to the combustion reaction of claim 27 , further comprising:
determining if the desired characteristic of the electric field applied proximate to the combustion reaction is different from a present characteristic of the electric field applied proximate to the combustion reaction; and
modifying the electric field responsive to the acoustic feedback when the desired characteristic is different from the present characteristic.

29. The method for controlling application of electricity to the combustion reaction of claim 15 , wherein the electric field includes a time-varying electric field.

30. A non-transitory computer readable medium carrying computer-readable instructions configured to cause the controller to perform the steps of claim 1 for controlling the application of electricity to a combustion reaction, wherein the controller is an electronic controller.

31. A non-transitory computer readable medium carrying computer-readable instructions configured to cause the controller to perform the steps of claim 15 for controlling the

Assignees

• Clearsign Comb Corp

Inventors

• Breidenthal Robert E
• Casasanta Iii Vincenzo
• Colannino Joseph
• Goodson David B
• Prevo Tracy A
• Rutkowski Richard F
• Wiklof Christopher A

Classifications

• F23B1/00

  Combustion apparatus using only lump fuel · CPC title

• F23N3/00

  Regulating air supply or draught (conjointly with fuel supply F23N1/00) · CPC title

• F23N5/16 Primary

  using noise-sensitive detectors · CPC title

• F23C99/001

  Applying electric means or magnetism to combustion (for combustion engines F02B51/04, F02M27/04) · CPC title