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A burner may include a dielectric body configured to hold one or more electrodes in proximity to a combustion reaction. The dielectric body may be cast from a refractory material. The one or more electrodes may be cast into the dielectric body. The dielectric body and the electrodes may be configure

A burner may include a dielectric body configured to hold one or more electrodes in proximity to a combustion reaction. The dielectric body may be cast from a refractory material. The one or more electrodes may be cast into the dielectric body. The dielectric body and the electrodes may be configured for installation, removal, and replacement as a unit.

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1. A burner configured for application of electrical energy to a combustion reaction, comprising: a combustor wall disposed to at least partially bound a combustion volume to separate the combustion volume from an external volume;at least one fuel nozzle configured to output a stream of fuel into th

1. A burner configured for application of electrical energy to a combustion reaction, comprising: a combustor wall disposed to at least partially bound a combustion volume to separate the combustion volume from an external volume;at least one fuel nozzle configured to output a stream of fuel into the combustion volume to support a combustion reaction in the combustion volume;at least one air flow passage configured to at least allow air to enter the combustion volume to support the combustion reaction;a dielectric body extending at least partly into the combustion volume, the dielectric body being formed from a cast refractory material; andone or more electrodes extending substantially through the dielectric body, the one or more electrodes being configured to convey electrical energy from the external volume to a location proximate to or coincident with the combustion reaction;wherein a protuberant section of at least one of the electrodes is positioned inside the combustion volume so as to be in direct contact with a flame. 2. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body is configured to operate, under at least one condition, as a bluff body for holding the combustion reaction. 3. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body is configured to at least partly define the at least one air flow passage. 4. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the at least one fuel nozzle is configured to direct at least a portion of at least one stream of fuel to impinge onto the dielectric body. 5. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body is configured to electrically insulate or electrically isolate the one or more electrodes extending substantially therethrough along all or a portion of the one or more electrodes. 6. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes includes an electrode configured to be operatively coupled to an electrical ground. 7. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes includes an electrode configured to provide a combustion reaction support point. 8. The burner configured for application of electrical energy to a combustion reaction of claim 7, wherein the electrode configured to provide a combustion reaction support point is configured to operatively couple to ground or to a voltage source through a current limiting resistor. 9. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes includes an electrode configured to be operatively coupled to a voltage source. 10. The burner configured for application of electrical energy to a combustion reaction of claim 9, wherein the electrode is configured to be operatively coupled to the voltage source through a current limiting resistor. 11. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes includes an electrode configured to provide an electric charge source or an electric field electrode to the combustion reaction or the stream of fuel. 12. The burner configured for application of electrical energy to a combustion reaction of claim 11, wherein the electric charge source includes sharp tip or serrations on the electrode. 13. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes includes a coupling surface configured to be held by the dielectric body outside the combustion volume, the coupling surface being configured to make an electrical connection to a voltage source, an electrical ground, or an electrical conductor operatively coupled to the voltage source or electrical ground disposed outside the combustion volume. 14. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body includes a mounting structure configured to be mounted to the combustor wall. 15. The burner configured for application of electrical energy to a combustion reaction of claim 14, wherein the mounting structure includes a flange. 16. The burner configured for application of electrical energy to a combustion reaction of claim 14, wherein the flange includes a plurality of bores configured to accept fasteners for mounting the dielectric body onto the combustor wall. 17. The burner configured for application of electrical energy to a combustion reaction of claim 16, wherein the plurality of bores include a plurality of compression-reinforcing cylinders configured to protect the refractory material of the dielectric body from crush damage. 18. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body is configured to be mounted to or removed from the combustor wall as a unit. 19. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body and the one or more electrodes are configured to be coupled to and removed from the combustor wall as a unit. 20. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body defines one or more cylindrical voids configured to accept the insertion of the one or more electrodes. 21. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes are cast into the dielectric body. 22. The burner configured for application of electrical energy to a combustion reaction of claim 21, wherein the dielectric body is formed by casting the refractory material in a mold cavity; and wherein the one or more electrodes is supported in the mold cavity during the formation of the dielectric body such that the refractory material flows or packs around the one or more electrodes to cause the one or more electrodes to be cast into the dielectric body when the refractory material is hardened. 23. The burner configured for application of electrical energy to a combustion reaction of claim 22, wherein the mold cavity includes at least one via for at least one electrode to extend through the mold cavity wall or bottom such that the at least one electrode extends from the dielectric body when the refractory material is hardened. 24. The burner configured for application of electrical energy to a combustion reaction of claim 21, wherein the one or more electrodes are configured to provide tensile reinforcement of the dielectric body. 25. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body includes tensile reinforcement. 26. The burner configured for application of electrical energy to a combustion reaction of claim 25, wherein the tensile reinforcement includes the at least one electrode. 27. The burner configured for application of electrical energy to a combustion reaction of claim 25, wherein the tensile reinforcement includes a structure other than the at least one electrode. 28. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body is formed in a mold cavity including one or more inserts configured to establish fastener locations in a dielectric body mounting structure. 29. The burner configured for application of electrical energy to a combustion reaction of claim 28, wherein the one or more inserts are configured to register a plurality of compression-reinforcing cylinders; and wherein the plurality of compression-reinforcing cylinders are cast into the dielectric body. 30. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body is formed by sand casting the refractory material. 31. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the cast refractory material includes a cement-bonded material. 32. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the cast refractory material includes a phosphate bonded materials. 33. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the cast refractory material includes fiber reinforcement. 34. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the cast refractory material includes an aggregate particle distribution. 35. The burner configured for application of electrical energy to a combustion reaction of claim 1, further comprising a metal casing disposed about an outside diameter of the dielectric body. 36. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the cast refractory material of the dielectric body comprises a plurality of refractory tile bricks. 37. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body forms an annular structure, the at least one air flow passage is disposed outside the annular structure, and one or more of the at least one fuel nozzles is configured to provide the stream of fuel at an interior of the annular structure of the dielectric body. 38. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes are permanently affixed through the dielectric body. 39. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein a protuberant section of each of the one or more electrodes extends out of the dielectric body. 40. The burner configured for application of electrical energy to a combustion reaction of claim 39, wherein the protuberant section of each of the one or more electrodes is angled toward a center of the burner structure, each protuberant section configured for contact with or increased proximity to the combustion reaction. 41. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes includes a single electrode that extends from the dielectric body and splits into a plurality of tips. 42. The burner configured for application of electrical energy to a combustion reaction of claim 41, further comprising an insulating covering disposed on a portion of the single electrode between the dielectric body and the plurality of tips. 43. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the one or more electrodes includes a single electrode that extends from the dielectric body and splits into a plurality of extensions, each extension conductively joined with a toric section, the toric section disposed for contact with the combustion reaction. 44. The burner configured for application of electrical energy to a combustion reaction of claim 43, wherein the toric section includes a coil of conductive material that generates a magnetic field when the single electrode receives an electrical current. 45. The burner configured for application of electrical energy to a combustion reaction of claim 1, wherein the dielectric body is cast to accept insertion therethrough, and to allow taking out therefrom, of at least one of the electrodes extending substantially through the dielectric body.