US3416870A - Apparatus for the application of an a.c. electrostatic field to combustion flames - Google Patents

Apparatus for the application of an a.c. electrostatic field to combustion flames Download PDF

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Publication number
US3416870A
US3416870A US505944A US50594465A US3416870A US 3416870 A US3416870 A US 3416870A US 505944 A US505944 A US 505944A US 50594465 A US50594465 A US 50594465A US 3416870 A US3416870 A US 3416870A
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flame
combustion
field
electrode
electrostatic field
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US505944A
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English (en)
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Franklin J Wright
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ExxonMobil Technology and Engineering Co
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Exxon Research and Engineering Co
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Priority to FR81678A priority patent/FR1504053A/fr
Priority to BE689144D priority patent/BE689144A/xx
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F23C99/001—Applying electric means or magnetism to combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/126—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electrical or electromechanical means

Definitions

  • FIG. 4 APPARATUS FOR THE APPLICATION OF AN A.C. ELECTROSTATIC F. J. WRIGHT FIELD TO COMBUSTION FLAMES Filed Nov. 1, 1965 7 Sheets-Sheet 3
  • FIG. 4
  • FIG. 5 APPARATUS FOR THE APPLICATION OF AN- A.C. ELECTROSTATIC FIELD To COMBUSTION FLAMES Filed Nov. 1, 1965 7 Sheets-Sheet 4
  • FIG. 5
  • This invention relates to the application of electrostatic fields to flames. More particularly, the invention relates to a process and apparatus for improving the characteristics of flames resulting from the combustion of gases, vapors, liquids, solids and mixtures of these by means of a particular type of electrostatic field.
  • D.C. currents and DC. electrostatic fields have been employed to bend flames and to increase the amount of heat generated by combustion.
  • the chief disadvantages of DC. currents and fields are flame distortion and excessive power dissipation.
  • the object of the present invention is to influence the movement of charged species present in flames without unduly distorting the flame.
  • Another object of the invention is to improve flame characteristics such as flame length, flame luminosity, flame color and soot forming tendency.
  • a major object of the invention is to provide the aforementioned objects by the application of a low power loss electrostatic field to the flame.
  • combustion efliciency and flame characteristics can be greatly improved by impressing an A.C. electrostatic field across a flame transverse to the flame and by insulating the flame from at least one of the electrodes.
  • FIGURE 1 is a schematic view of the apparatus showing one arrangement of the apparatus elements.
  • FIGURES 2 and 3 are side and top views respectively of a particular electrode configuration.
  • FIGURE 4 is a graphical comparison of luminosity and field strength.
  • FIGURE 5 is a graph showing the effect of field strength on a propane diffusion flame.
  • FIGURE 6 is a graph showing the effect of A.C. frequency on a propane diffusion flame.
  • FIGURES 7 and 8 are schematic views of flames with and without the A.C. field.
  • FIGURE 9 is a schematic view of an apparatus having two sets of electrodes, each set having a different frequency.
  • FIGURE 10 shows the location of a pair of electrodes with respect to the flame and the burner head.
  • reference numeral 1 denotes a line carrying a fuel from any suitable source.
  • the fuel line is oriented with a hole 2 drilled in a Teflon block 3.
  • the block is also drilled vertically and a glass burner tube 4 is inserted in the hole.
  • the burner tube terminates in a nozzle 5 having a diameter of 2.2 mm.
  • the burner tube is surrounded by a glass chimney 6.
  • the chimney is 4 inches in diameter and is inches long.
  • the bottom of the chimney is sealed by means of a rubber stopper 7.
  • Combustion air is supplied by line 8 which passes through the stopper and terminates at the bottom of a layer of lead shot 9.
  • the purpose of the layer of lead shot is to distribute the air over the cross-sectional area of the chimney producing a smooth flow of air vertically through the chimney.
  • a Nichrome wire electrode 10 passes from attachment point 11 in the Teflon block through the burner tube to a suitable attachment point 12 above the glass chimney. Both attachment points are insulated.
  • a cylindrical copper electrode 13 which is 5 inches in diameter and 8 inches long surrounds the glass chimney. Thus the chimney insulates the Nichrome wire electrode 10 from the copper electrode 13 and as a result there is essentially no flow of current through the flame 14.
  • switch 14 When the A.C. field is to be applied to the flame, switch 14 is closed activating transformer 15.
  • the A.C. circuit is completed by line 16 connected to Nichrome wire electrode 10 and line 17 connected to cylindrical copper electrode 13.
  • the transformer can be of the variable type capable of supplying a field strength of 1-500 kv.
  • a voltmeter 18 is connected across lines 16 and 17 and line 17 contains an ammeter 19.
  • the apparatus described above was used to altar the flame characteristics of a propane flame.
  • Propane was passed by line 1 at selected rates ranging from .05 to 15 liters per minute to the nozzle 5.
  • the flow of fuel and air was adjusted to provide flames having a length of 4 to 40 inches.
  • Both laminar and turbulent flames were subjected to the A.C. field.
  • the temperature of the Nichrome wire 10 is measured by an optical pyrometer was found to have been raised from 1700 F. to 1800 F. by the application of a field of 500 v./cm. with a power dissipation of .03 watt.
  • the A.C. field of the invention can be applied to gases such as natural gas, stack gases, propane, butane, producer gas and in general to any other type of combustible gas having suflicient ionic species which are affected by an A.C. field.
  • gases such as natural gas, stack gases, propane, butane, producer gas and in general to any other type of combustible gas having suflicient ionic species which are affected by an A.C. field.
  • the concept can also be applied to vapor or liquid fuels having an initial boiling point ranging from F. to 700 F., preferably 80 F. to 400 P. such as naphtha, fuel oil, gasoline, kerosene, coal oil, petroleum residuum, petroleum crude oil and the like.
  • the liquid fuels are usually vaporized by heat or atomized by passing them through an atomizing nozzle into a combustion zone in the form of vapor or fine droplets, mist or fog'.
  • the fuels can be premixed with air
  • FIGURE 2 discloses an embodiment in which the flame 50 from burner 51 is centrally located in an A.C. electrostatic field.
  • the electrodes 52 and 53 are curved to partially encircle the flame and they are approximately the same length as the flame.
  • Line 54 connects one electrode with transformer 55.
  • Line 56 connects the other electrode with the transformer.
  • the electrodes are held in the desired position relative to the flame by any suitable type of mounting bracket, not shown.
  • FIGURE 3 has been included to show that electrode 52 is coated or covered with an electrical insulation material 57. Electrode 53 is also coated or covered with an insulating material 58. Suitable insulating materials include non-combustible materials such as ceramics, Alundum, etc.
  • FIGURE 4 is a plot of luminosity versus field strength.
  • the data points were obtained using an apparatus like that shown in FIGURE 1, a photocell was oriented toward the flame. The voltage was varied from 0 to 10 kv.
  • the luminosity of a flame is the amount of light it gives off. In terms of flame quality, a yellow flame is a low 3 quality flame and a blue flame is an efficient high quality flame.
  • the curves plotted in FIGURE 4 show that with propane diffusion flames derived from burning 1 liter of propane per minute and 10 liters of propane per minute the luminosity decreases as the A.C. field intensity is increased.
  • FIGURE 5 discloses another method of showing the effect of field strength on the flame.
  • An apparatus like that shown in FIGURE 1 is modified to supply nitrogen to the burner.
  • the propane-air ratio is fixed to produce a luminous (yellow) flame
  • the flame can be made nonluminous by the addition of nitrogen to the fuel. This is because the addition of nitrogen to the propane leads to increased turbulence of the flame which leads to more effective mixing of the fuel with air.
  • the plot shows that without the field over 1.7 liters per minute of nitrogen must be added to the propane to achieve a nonluminous flame.
  • the A.C. field strength is increased, much less nitrogen is required.
  • the nitrogen requirement levels out at about 1 liter per minute to achieve nonluminous combustion.
  • the A.C. field was also applied to the flame derived from premixing 0.5 liter per minute of air with 2 liters per minute of propane and controlling the secondary air at 2 liters per minute.
  • the field was increased over a range of 0 to K volts at 60 cycles per second the nitrogen requirement decreased.
  • field assisted combustion provided improved results with diffusion flames and premixed flames.
  • FIGURE 6 discloses the effect of frequency variation on nitrogen requirement. As explained previously with respect to FIGURE 5, the smaller nitrogen requirement indicates improved combustion. The plot indicates that A.C. frequencies above 60 cycles per second provided improved combustion. Frequencies of 1 to 2000 cycles per second are satisfactory to provide the fields of the invention and frequencies of 60 to 500 cycles per second are preferred.
  • FIGURES 7 and 8 disclose a comparison of the effect of the field on a propane diffusion flame.
  • the flame was derived from the combustion of propane fuel flowing at the rate of 6 liters per minute through a glass burner tube. Air was supplied at the rate of 240' liters per minute through a bed of lead shot.
  • the apparatus was essentially the same as the apparatus shown in FIGURE 1 except that the copper electrode encircled only half of the glass insulating chimney. This configuration was used to permit visual observation and to photograph the flame.
  • FIGURE 7 depicts the flame without the electrostatic field.
  • the flame cone extends about 12 inches above the glass chimney which is inches long.
  • the flame consists of a white zone about an inch in height, a blue zone about 6 inches in height and a yellow zone about 24 inches in height.
  • FIGURE 8 shows the effect of a 10.8 kv., 60 cycle per second insulated A.C. field on the same propane-air combustion mixture. When the field is applied, the yellow zone is eliminated which indicates that combustion is greatly improved. The flame cone also shrinks to an overall length of about 16 inches. The white zone of FIGURE 8 is higher above the tip of the burner. This is due at least in part to the fact that the propane and air are mixing for a longer period of time prior to ignition.
  • the foregoing comparison of FIGURES 7 and 8 clearly demonstrates the improved combustion made possible by the application of an insulated A.C. field.
  • the power dissipation across a field like that shown in FIGURE 8 is less than about one watt; thus the cost of the field is negligible in terms of power consumption.
  • FIGURES 9 and 10 disclose an embodiment of the invention in which two separate insulated A.C. electrostatic fields are applied across a flame at different frequencies.
  • FIGURE 9 is a top view showing the location of the groups of electrodes with respect to each other.
  • Transformer 101 provides a 60 cycle alternating frequency of the desired voltage to provide a field between one group of electrodes connected in parallel and shown generally by reference numeral 102 and another group of electrodes also connected in parallel and shown generally by reference numeral 103.
  • a second transformer 104 provides a 120 cycle alternating frequency of the desired voltage to provide another field between a group of electrodes connected in parallel and shown generally by reference numeral 105 and another group of electrodes connected in parallel and shown generally by reference numeral 106.
  • Both sets of electrodes are located on opposite sides of the flame issuing vertically from burner 107.
  • FIGURE 10 is included to show the placement of two electrodes 10-8 and 109 having the same current source with respect to flame 110 and burner 111. Suitable brackets, not shown, are employed for holding the electrodes in place.
  • the frequency of the two sets of electrodes can be in phase or out of phase. For example, if one set of electrodes has a frequency of 60 cycles, the other set can have a frequency of cycles or 100, 160, 300 or more cycles. Any desired number and placement of sets of electrodes in a horizontal or vertical plane can be used to provide one or more electrostatic fields having lines of force cutting across the flame at any desired angle.
  • Apparatus for improving the combustion of a fuelair mixture formed into a flame having a lengthwise axis comprising:
  • dielectric wall means disposed around said flame and being generally parallel to said axis
  • first electrode means extending from said fuel-air supply means substantially along said axis of said flame
  • second electrode means positioned exteriorly of said wall means for establishing an electrostatic field transversely across the lengthwise axis of said flame in cooperation with said first electrode

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
US505944A 1965-11-01 1965-11-01 Apparatus for the application of an a.c. electrostatic field to combustion flames Expired - Lifetime US3416870A (en)

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US505944A US3416870A (en) 1965-11-01 1965-11-01 Apparatus for the application of an a.c. electrostatic field to combustion flames
FR81678A FR1504053A (fr) 1965-11-01 1966-10-26 Procédé et appareil pour appliquer à des flammes un champ alternatif isolé
BE689144D BE689144A (forum.php) 1965-11-01 1966-10-31

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Cited By (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308006A (en) * 1978-10-05 1981-12-29 Ocean Ecology Ltd. Method and apparatus for atomizing and burning liquid hydrocarbons floating on water
US5702244A (en) * 1994-06-15 1997-12-30 Thermal Energy Systems, Incorporated Apparatus and method for reducing particulate emissions from combustion processes
US6401445B1 (en) 1999-12-07 2002-06-11 Northern Research & Engineering Corp. Electrolysis system and method for improving fuel atomization and combustion
WO2003014622A1 (de) 2001-08-01 2003-02-20 Siemens Aktiengesellschaft Verfahren und vorrichtung zur beeinflussung von verbrennungsvorgängen bei brennstoffen
WO2004059209A1 (de) 2002-12-23 2004-07-15 Siemens Aktiengesellschaft Verfahren und vorrichtung zur beeinflussung von verbrennungsvorgängen bei brennstoffen
US20050170301A1 (en) * 2004-01-29 2005-08-04 Siemens Westinghouse Power Corporation Electric flame control using corona discharge enhancement
US20060286492A1 (en) * 2005-06-17 2006-12-21 Perkinelmer, Inc. Boost devices and methods of using them
US20070261383A1 (en) * 2004-09-27 2007-11-15 Siemens Aktiengesellschaft Method and Device For Influencing Combustion Processes, In Particular During the Operation of a Gas Turbine
US20080044781A1 (en) * 2006-08-17 2008-02-21 Stolyarenko Hennadiy Stepanovy Method of solid fuel combustion intensification
US20080163614A1 (en) * 2005-08-12 2008-07-10 Proto-Technics, Inc. Turbulence Burner With Vortex Structures
US20090151322A1 (en) * 2007-12-18 2009-06-18 Perriquest Defense Research Enterprises Llc Plasma Assisted Combustion Device
US20090166179A1 (en) * 2002-12-12 2009-07-02 Peter Morrisroe Induction Device
US20100320379A1 (en) * 2005-06-17 2010-12-23 Peter Morrisroe Devices and systems including a boost device
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1473716A (en) * 1921-05-16 1923-11-13 Freyn Brassert & Company Gas bleeder
US2763125A (en) * 1951-04-05 1956-09-18 Kadosch Marcel Means for controlling the direction of a stream of ionized fluid
US2963864A (en) * 1957-06-26 1960-12-13 Fairchild Engine & Airplane Flame stabilization by corona discharge
US3224485A (en) * 1963-05-06 1965-12-21 Inter Probe Heat control device and method
US3306338A (en) * 1965-11-01 1967-02-28 Exxon Research Engineering Co Apparatus for the application of insulated a.c. fields to flares

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1473716A (en) * 1921-05-16 1923-11-13 Freyn Brassert & Company Gas bleeder
US2763125A (en) * 1951-04-05 1956-09-18 Kadosch Marcel Means for controlling the direction of a stream of ionized fluid
US2963864A (en) * 1957-06-26 1960-12-13 Fairchild Engine & Airplane Flame stabilization by corona discharge
US3224485A (en) * 1963-05-06 1965-12-21 Inter Probe Heat control device and method
US3306338A (en) * 1965-11-01 1967-02-28 Exxon Research Engineering Co Apparatus for the application of insulated a.c. fields to flares

Cited By (118)

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Publication number Priority date Publication date Assignee Title
US4308006A (en) * 1978-10-05 1981-12-29 Ocean Ecology Ltd. Method and apparatus for atomizing and burning liquid hydrocarbons floating on water
US5702244A (en) * 1994-06-15 1997-12-30 Thermal Energy Systems, Incorporated Apparatus and method for reducing particulate emissions from combustion processes
US6401445B1 (en) 1999-12-07 2002-06-11 Northern Research & Engineering Corp. Electrolysis system and method for improving fuel atomization and combustion
US20040185397A1 (en) * 2001-08-01 2004-09-23 Branston David Walter Method and device for influencing combustion processes involving combustibles
DE10137683C2 (de) * 2001-08-01 2003-05-28 Siemens Ag Verfahren und Vorrichtung zur Beeinflussung von Verbrennungsvorgängen bei Brennstoffen
US7137808B2 (en) 2001-08-01 2006-11-21 Siemens Aktiengesellschaft Method and device for influencing combustion processes involving combustibles
WO2003014622A1 (de) 2001-08-01 2003-02-20 Siemens Aktiengesellschaft Verfahren und vorrichtung zur beeinflussung von verbrennungsvorgängen bei brennstoffen
US20070026354A1 (en) * 2001-08-01 2007-02-01 Branston David W Method and device for influencing combustion processes involving combustibles
DE10137683A1 (de) * 2001-08-01 2003-02-20 Siemens Ag Verfahren und Vorrichtung zur Beeinflussung von Verbrennungsvorgängen bei Brennstoffen
US8263897B2 (en) 2002-12-12 2012-09-11 Perkinelmer Health Sciences, Inc. Induction device
US8742283B2 (en) 2002-12-12 2014-06-03 Perkinelmer Health Sciences, Inc. Induction device
US20090166179A1 (en) * 2002-12-12 2009-07-02 Peter Morrisroe Induction Device
US9360430B2 (en) 2002-12-12 2016-06-07 Perkinelmer Health Services, Inc. Induction device
WO2004059209A1 (de) 2002-12-23 2004-07-15 Siemens Aktiengesellschaft Verfahren und vorrichtung zur beeinflussung von verbrennungsvorgängen bei brennstoffen
US20070020567A1 (en) * 2002-12-23 2007-01-25 Branston David W Method and device for influencing combution processes of fuels
US7243496B2 (en) * 2004-01-29 2007-07-17 Siemens Power Generation, Inc. Electric flame control using corona discharge enhancement
US20050170301A1 (en) * 2004-01-29 2005-08-04 Siemens Westinghouse Power Corporation Electric flame control using corona discharge enhancement
US20070261383A1 (en) * 2004-09-27 2007-11-15 Siemens Aktiengesellschaft Method and Device For Influencing Combustion Processes, In Particular During the Operation of a Gas Turbine
US10368427B2 (en) 2005-03-11 2019-07-30 Perkinelmer Health Sciences, Inc. Plasmas and methods of using them
US8896830B2 (en) 2005-06-17 2014-11-25 Perkinelmer Health Sciences, Inc. Devices and systems including a boost device
US20100320379A1 (en) * 2005-06-17 2010-12-23 Peter Morrisroe Devices and systems including a boost device
US8289512B2 (en) 2005-06-17 2012-10-16 Perkinelmer Health Sciences, Inc. Devices and systems including a boost device
US9847217B2 (en) 2005-06-17 2017-12-19 Perkinelmer Health Sciences, Inc. Devices and systems including a boost device
US20060286492A1 (en) * 2005-06-17 2006-12-21 Perkinelmer, Inc. Boost devices and methods of using them
US8622735B2 (en) * 2005-06-17 2014-01-07 Perkinelmer Health Sciences, Inc. Boost devices and methods of using them
US20080163614A1 (en) * 2005-08-12 2008-07-10 Proto-Technics, Inc. Turbulence Burner With Vortex Structures
US20080044781A1 (en) * 2006-08-17 2008-02-21 Stolyarenko Hennadiy Stepanovy Method of solid fuel combustion intensification
US20090151322A1 (en) * 2007-12-18 2009-06-18 Perriquest Defense Research Enterprises Llc Plasma Assisted Combustion Device
US8851882B2 (en) 2009-04-03 2014-10-07 Clearsign Combustion Corporation System and apparatus for applying an electric field to a combustion volume
US20110027734A1 (en) * 2009-04-03 2011-02-03 Clearsign Combustion Corporation System and apparatus for applying an electric field to a combustion volume
US20110203771A1 (en) * 2010-01-13 2011-08-25 Clearsign Combustion Corporation Method and apparatus for electrical control of heat transfer
US9151549B2 (en) 2010-01-13 2015-10-06 Clearsign Combustion Corporation Method and apparatus for electrical control of heat transfer
US20140295360A1 (en) * 2010-04-01 2014-10-02 Clearsign Combustion Corporation Electrodynamic control in a burner system
US9732958B2 (en) * 2010-04-01 2017-08-15 Clearsign Combustion Corporation Electrodynamic control in a burner system
US11073280B2 (en) 2010-04-01 2021-07-27 Clearsign Technologies Corporation Electrodynamic control in a burner system
US9046270B2 (en) * 2010-07-28 2015-06-02 Rolls-Royce Plc Controllable flameholder
US20120023950A1 (en) * 2010-07-28 2012-02-02 Rolls-Royce Plc Controllable flameholder
EP2668447A4 (en) * 2011-01-24 2016-11-02 Clearsign Comb Corp SYSTEM AND DEVICE FOR APPLYING AN ELECTRIC FIELD TO A COMBUSTION VOLUME
US20130071794A1 (en) * 2011-02-09 2013-03-21 Clearsign Combustion Corporation System and method for flattening a flame
US8881535B2 (en) 2011-02-09 2014-11-11 Clearsign Combustion Corporation Electric field control of two or more responses in a combustion system
US9958154B2 (en) * 2011-02-09 2018-05-01 Clearsign Combustion Corporation System and method for flattening a flame
US10088151B2 (en) 2011-02-09 2018-10-02 Clearsign Combustion Corporation Method for electrodynamically driving a charged gas or charged particles entrained in a gas
US20150024331A1 (en) * 2011-02-09 2015-01-22 Clearsign Combustion Corporation Electric field control of two or more responses in a combustion system
US9243800B2 (en) 2011-02-09 2016-01-26 Clearsign Combustion Corporation Apparatus for electrodynamically driving a charged gas or charged particles entrained in a gas
US20140220500A1 (en) * 2011-05-31 2014-08-07 President And Fellows Of Harvard College Manipulation of flames and related methods and apparatus
EP2798270A4 (en) * 2011-12-30 2015-08-26 Clearsign Comb Corp METHOD AND APPARATUS FOR ENHANCING FLAME RADIATION
US20160123576A1 (en) * 2011-12-30 2016-05-05 Clearsign Combustion Corporation Method and apparatus for enhancing flame radiation in a coal-burner retrofit
US20130170090A1 (en) * 2011-12-30 2013-07-04 Clearsign Combustion Corporation Method and apparatus for enhancing flame radiation
US9209654B2 (en) * 2011-12-30 2015-12-08 Clearsign Combustion Corporation Method and apparatus for enhancing flame radiation
US9284886B2 (en) 2011-12-30 2016-03-15 Clearsign Combustion Corporation Gas turbine with Coulombic thermal protection
US9879858B2 (en) 2012-03-01 2018-01-30 Clearsign Combustion Corporation Inertial electrode and system configured for electrodynamic interaction with a flame
US9377195B2 (en) * 2012-03-01 2016-06-28 Clearsign Combustion Corporation Inertial electrode and system configured for electrodynamic interaction with a voltage-biased flame
US20130230811A1 (en) * 2012-03-01 2013-09-05 Clearsign Combustion Corporation Inertial electrode and system configured for electrodynamic interaction with a voltage-biased flame
US9366427B2 (en) 2012-03-27 2016-06-14 Clearsign Combustion Corporation Solid fuel burner with electrodynamic homogenization
US9696031B2 (en) 2012-03-27 2017-07-04 Clearsign Combustion Corporation System and method for combustion of multiple fuels
US9289780B2 (en) 2012-03-27 2016-03-22 Clearsign Combustion Corporation Electrically-driven particulate agglomeration in a combustion system
US20130255548A1 (en) * 2012-03-27 2013-10-03 Clearsign Combustion Corporation Multiple fuel combustion system and method
US9267680B2 (en) * 2012-03-27 2016-02-23 Clearsign Combustion Corporation Multiple fuel combustion system and method
US9468936B2 (en) 2012-03-27 2016-10-18 Clearsign Combustion Corporation Electrically-driven particulate agglomeration in a combustion system
US10101024B2 (en) 2012-03-27 2018-10-16 Clearsign Combustion Corporation Method for combustion of multiple fuels
US9909757B2 (en) 2012-05-31 2018-03-06 Clearsign Combustion Corporation Low NOx burner and method of operating a low NOx burner
US9453640B2 (en) 2012-05-31 2016-09-27 Clearsign Combustion Corporation Burner system with anti-flashback electrode
US10753605B2 (en) 2012-05-31 2020-08-25 Clearsign Technologies Corporation Low NOx burner
US20150338089A1 (en) * 2012-06-29 2015-11-26 Clearsign Combustion Corporation Combustion system with a corona electrode
US9686849B2 (en) 2012-07-13 2017-06-20 Perkinelmer Health Sciences, Inc. Torches and methods of using them
US9259798B2 (en) 2012-07-13 2016-02-16 Perkinelmer Health Sciences, Inc. Torches and methods of using them
US9702550B2 (en) 2012-07-24 2017-07-11 Clearsign Combustion Corporation Electrically stabilized burner
US9310077B2 (en) 2012-07-31 2016-04-12 Clearsign Combustion Corporation Acoustic control of an electrodynamic combustion system
US9605849B2 (en) 2012-07-31 2017-03-28 Clearsign Combustion Corporation Acoustic control of an electrodynamic combustion system
US8911699B2 (en) 2012-08-14 2014-12-16 Clearsign Combustion Corporation Charge-induced selective reduction of nitrogen
US10359189B2 (en) 2012-09-10 2019-07-23 Clearsign Combustion Corporation Electrodynamic combustion control with current limiting electrical element
US9494317B2 (en) 2012-09-10 2016-11-15 Clearsign Combustion Corporation Electrodynamic combustion control with current limiting electrical element
US9496688B2 (en) 2012-11-27 2016-11-15 Clearsign Combustion Corporation Precombustion ionization
US9513006B2 (en) 2012-11-27 2016-12-06 Clearsign Combustion Corporation Electrodynamic burner with a flame ionizer
US9746180B2 (en) 2012-11-27 2017-08-29 Clearsign Combustion Corporation Multijet burner with charge interaction
US9562681B2 (en) 2012-12-11 2017-02-07 Clearsign Combustion Corporation Burner having a cast dielectric electrode holder
US20140170569A1 (en) * 2012-12-12 2014-06-19 Clearsign Combustion Corporation Electrically controlled combustion system with contact electrostatic charge generation
US20140170576A1 (en) * 2012-12-12 2014-06-19 Clearsign Combustion Corporation Contained flame flare stack
US20140170575A1 (en) * 2012-12-14 2014-06-19 Clearsign Combustion Corporation Ionizer for a combustion system, including foam electrode structure
US10677454B2 (en) 2012-12-21 2020-06-09 Clearsign Technologies Corporation Electrical combustion control system including a complementary electrode pair
US20150345781A1 (en) * 2012-12-26 2015-12-03 Clearsign Combustion Corporation Combustion system with a grid switching electrode
US10060619B2 (en) * 2012-12-26 2018-08-28 Clearsign Combustion Corporation Combustion system with a grid switching electrode
US10627106B2 (en) 2012-12-26 2020-04-21 Clearsign Technologies Corporation Combustion system with a grid switching electrode
US9441834B2 (en) 2012-12-28 2016-09-13 Clearsign Combustion Corporation Wirelessly powered electrodynamic combustion control system
US9469819B2 (en) 2013-01-16 2016-10-18 Clearsign Combustion Corporation Gasifier configured to electrodynamically agitate charged chemical species in a reaction region and related methods
US9797595B2 (en) 2013-02-14 2017-10-24 Clearsign Combustion Corporation Fuel combustion system with a perforated reaction holder
US9388981B2 (en) 2013-02-14 2016-07-12 Clearsign Combustion Corporation Method for flame location transition from a start-up location to a perforated flame holder
US9803855B2 (en) 2013-02-14 2017-10-31 Clearsign Combustion Corporation Selectable dilution low NOx burner
US11156356B2 (en) 2013-02-14 2021-10-26 Clearsign Technologies Corporation Fuel combustion system with a perforated reaction holder
US10337729B2 (en) 2013-02-14 2019-07-02 Clearsign Combustion Corporation Fuel combustion system with a perforated reaction holder
US10571124B2 (en) 2013-02-14 2020-02-25 Clearsign Combustion Corporation Selectable dilution low NOx burner
US9377190B2 (en) 2013-02-14 2016-06-28 Clearsign Combustion Corporation Burner with a perforated flame holder and pre-heat apparatus
US9377189B2 (en) 2013-02-21 2016-06-28 Clearsign Combustion Corporation Methods for operating an oscillating combustor with pulsed charger
US9377188B2 (en) 2013-02-21 2016-06-28 Clearsign Combustion Corporation Oscillating combustor
US10047950B2 (en) 2013-02-21 2018-08-14 Clearsign Combustion Corporation Oscillating combustor with pulsed charger
US9696034B2 (en) * 2013-03-04 2017-07-04 Clearsign Combustion Corporation Combustion system including one or more flame anchoring electrodes and related methods
US20140248566A1 (en) * 2013-03-04 2014-09-04 Clearsign Combustion Corporation Combustion system including one or more flame anchoring electrodes and related methods
US9371994B2 (en) 2013-03-08 2016-06-21 Clearsign Combustion Corporation Method for Electrically-driven classification of combustion particles
US20140287368A1 (en) * 2013-03-23 2014-09-25 Clearsign Combustion Corporation Premixed flame location control
US10808925B2 (en) 2013-03-27 2020-10-20 Clearsign Technologies Corporation Method for electrically controlled combustion fluid flow
US10190767B2 (en) 2013-03-27 2019-01-29 Clearsign Combustion Corporation Electrically controlled combustion fluid flow
US9739479B2 (en) 2013-03-28 2017-08-22 Clearsign Combustion Corporation Battery-powered high-voltage converter circuit with electrical isolation and mechanism for charging the battery
US10125979B2 (en) 2013-05-10 2018-11-13 Clearsign Combustion Corporation Combustion system and method for electrically assisted start-up
US20160138800A1 (en) * 2013-07-29 2016-05-19 Clearsign Combustion Corporation Combustion-powered electrodynamic combustion system
US9574767B2 (en) * 2013-07-29 2017-02-21 Clearsign Combustion Corporation Combustion-powered electrodynamic combustion system
US10161625B2 (en) 2013-07-30 2018-12-25 Clearsign Combustion Corporation Combustor having a nonmetallic body with external electrodes
US10295175B2 (en) 2013-09-13 2019-05-21 Clearsign Combustion Corporation Transient control of a combustion Reaction
US10364980B2 (en) 2013-09-23 2019-07-30 Clearsign Combustion Corporation Control of combustion reaction physical extent
US10422523B2 (en) 2013-10-04 2019-09-24 Clearsign Combustion Corporation Ionizer for a combustion system
US10295185B2 (en) 2013-10-14 2019-05-21 Clearsign Combustion Corporation Flame visualization control for electrodynamic combustion control
US10240788B2 (en) 2013-11-08 2019-03-26 Clearsign Combustion Corporation Combustion system with flame location actuation
US10066835B2 (en) 2013-11-08 2018-09-04 Clearsign Combustion Corporation Combustion system with flame location actuation
US20160363315A1 (en) * 2013-12-31 2016-12-15 Clearsign Combustion Corporation Method and apparatus for extending flammability and stability limits in a combustion reaction
US9828288B2 (en) 2014-08-13 2017-11-28 Clearsign Combustion Corporation Perforated burner for a rotary kiln
US20160158585A1 (en) * 2014-12-08 2016-06-09 United States Of America As Represented By The Secretary Of The Navy Electromagnetic Fire Control System
US10677455B2 (en) 2015-06-24 2020-06-09 Khalifa University of Science and Technology Electrostatically manipulated flames for compact heat generation
WO2016210336A1 (en) * 2015-06-24 2016-12-29 Khalifa University of Science, Technology & Research Electrostatically manipulated flames for compact heat generation
US11506380B2 (en) 2015-06-24 2022-11-22 Khalifa University of Science and Technology Electrostatically manipulated flames for compact heat generation

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