Acoustic control of an electrodynamic combustion system

Patent metadata

Field	Value
Publication number	US-9310077-B2
Application number	US-201313956315-A
Country	US
Kind code	B2
Filing date	Jul 31, 2013
Priority date	Jul 31, 2012
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

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 system for applying electricity to a combustion reaction, comprising:
a power supply;
one or more electrodes that are:
operatively coupled to the power supply; and
configured to apply an electric field, a charge, a voltage, or a combination thereof to the combustion reaction;

an acoustic transducer configured to receive an acoustic signal from the combustion reaction and output an electrical signal corresponding to the acoustic signal; and
a controller that is:
operatively coupled to the acoustic transducer and the power supply; and
configured to control one or more outputs from the power supply to the one or more electrodes responsive to the electrical signal output from the acoustic transducer;

wherein the controller includes an electrode selector configured to select one or more electrodes from a plurality of electrodes, responsive to the electrical signal from the acoustic transducer.

2. The system for applying electricity to the combustion reaction of claim 1 , wherein the controller includes a waveform controller configured to control a waveform corresponding to the one or more outputs from the power supply, wherein the waveform controller is configured to control the waveform responsive to the electrical signal from the acoustic transducer.

3. The system for applying electricity to the combustion reaction of claim 1 , wherein the controller includes an interface configured to output to the power supply at least one signal selected from the group consisting of:
one or more waveform signals, one or more electrode selection signals, and one or more voltage control signals.

4. The system for applying electricity to the combustion reaction of claim 1 , further comprising a burner configured to support the combustion reaction.

5. The system for applying electricity to the combustion reaction of claim 1 , wherein the combustion reaction includes a flame.

6. The system for applying electrical energy to the combustion reaction of claim 1 , wherein the one or more electrodes includes at least one charge electrode configured to apply a majority charge or a voltage to the combustion reaction.

7. The system for applying electrical energy to the combustion reaction of claim 6 , wherein the voltage source is configured to cause the charge electrode to apply a time-varying majority charge or a time-varying voltage to the combustion reaction.

8. The system for applying electricity to the combustion reaction of claim 1 , wherein the one or more electrodes includes at least one field electrode configured to apply one or more electric fields to the combustion reaction.

9. The system for applying electricity to the combustion reaction of claim 8 , wherein the power supply is configured to cause the at least one field electrode to apply one or more time-varying electric fields to the combustion reaction.

10. The system for applying electricity to the combustion reaction of claim 1 , wherein the power supply is configured to drive the one or more electrodes with one or more periodic voltage waveforms.

11. The system for applying electricity to the combustion reaction of claim 10 , wherein the one or more periodic voltage waveforms includes at least one of an alternating current (AC) voltage waveform, a sinusoidal waveform, a square waveform, a sawtooth waveform, a triangular waveform, a wavelet waveform, a logarithmic waveform, an exponential waveform, a truncated waveform, or a combination waveform thereof.

12. The system for applying electricity to the combustion reaction of claim 1 , wherein the controller is configured to control the one or more outputs from the power supply to reduce a white noise and/or a tone noise emitted by the combustion reaction responsive to the electrical signal from the acoustic transducer.

13. The system for applying electricity to the combustion reaction of claim 1 , wherein the controller is configured to control the one or more outputs from the power supply to apply the voltage responsive to the electrical signal from the acoustic transducer.

14. The system for applying electricity to the combustion reaction of claim 13 , wherein the controller is configured to cause the one or more outputs from the power supply to apply one or more voltages proportional to an amplitude of the electrical signal from the acoustic transducer.

15. The system for applying electricity to the combustion reaction of claim 13 , wherein the controller is configured to cause the one or more outputs from the power supply to apply one or more voltages proportional to an amplitude of a white noise component of the electrical signal from the acoustic transducer and/or a tonal noise component of the electrical signal from the acoustic transducer.

16. The system for applying electricity to the combustion reaction of claim 1 , wherein the controller is configured to:
determine at least one of a combustion reaction rate and a fuel flow rate from the electrical signal from the acoustic transducer; and
select a waveform for output to the one or more electrodes, the waveform being configured according to the combustion reaction rate or the fuel flow rate.

17. The system for applying electricity to the combustion reaction of claim 1 , wherein the controller is configured to:
determine at least one of a combustion reaction rate and a fuel flow rate from the electrical signal from the acoustic transducer; and
select a voltage for output to the one or more electrodes, the voltage being configured according to the combustion reaction rate or the fuel flow rate.

18. The system for applying electricity to the combustion reaction of claim 1 , wherein the controller is configured to:
determine at least one of a combustion reaction rate and a fuel flow rate from the electrical signal from the acoustic transducer; and
select a subset of a plurality of electrodes for driving by the power supply, the subset of the plurality of electrodes being configured according to the combustion reaction rate or the fuel flow rate.

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

• F23C99/001

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

• F23B1/00

  Combustion apparatus using only lump fuel · CPC title

• F23N5/16 Primary

  using noise-sensitive detectors · CPC title

• F23N3/00

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