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The present invention is a pulse detonation combustion system, having a plurality of detonation initiation devices coupled to a main combustion chamber, where each of the detonation initiation devices is operating out-of-phase with each other. Each of the detonation initiation devices assists in the

The present invention is a pulse detonation combustion system, having a plurality of detonation initiation devices coupled to a main combustion chamber, where each of the detonation initiation devices is operating out-of-phase with each other. Each of the detonation initiation devices assists in the initiation of a detonation in the main combustion chamber, out-of-phase from each other such that the operational frequency of the pulse detonation combustion system is related to the number of detonation initiation devices multiplied by the operational frequency of a single detonation initiation device.

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What is claimed is: 1. A pulse detonation combustor, comprising: a main combustion chamber; and a plurality of detonation initiation devices coupled to said main combustion chamber, wherein at least one of said detonation initiation devices initiates a first detonation within said main combustion

What is claimed is: 1. A pulse detonation combustor, comprising: a main combustion chamber; and a plurality of detonation initiation devices coupled to said main combustion chamber, wherein at least one of said detonation initiation devices initiates a first detonation within said main combustion chamber out-of-phase with another of said detonation initiation devices initiating a second detonation within said main combustion chamber and wherein at least one of said detonation initiation devices is a pulse detonation combustion device. 2. The pulse detonation combustor of claim 1, wherein all of said detonation initiation devices are pulse detonation combustion devices. 3. The pulse detonation combustor of claim 1, wherein each of said detonation initiation devices operates out-of-phase with the remaining of said detonation initiation devices. 4. The pulse detonation combustor of claim 1, wherein at least one of said detonation initiation devices is located within said main combustion chamber. 5. The pulse detonation combustor of claim 1, wherein a frequency of detonations within said main combustion chamber is within the range of 100 to 400 Hz. 6. The pulse detonation combustor of claim 1, wherein a frequency of detonations within said main combustion chamber is at least 100 Hz. 7. The pulse detonation combustor of claim 1, wherein each of said detonation initiation devices further comprises an exit portion positioned at a surface of said main combustion chamber. 8. The pulse detonation combustor of claim 7, wherein at least one of said exit portions is positioned on said surface such that a flow from said at least one exit portion enters said main combustion chamber perpendicular to said surface. 9. The pulse detonation combustor of claim 1, wherein said plurality of detonation initiation devices are positioned symmetrically with respect to said main combustion chamber. 10. The pulse detonation combustor of claim 1, wherein the operational frequency of each of said detonation initiation devices is in the range of 20 to 100 Hz. 11. The pulse detonation combustor of claim 1, wherein each of said detonation initiation devices comprises a nozzle coupled to said main combustion chamber. 12. The pulse detonation combustor of claim 11, wherein an area of an exit opening of said nozzle is smaller than an area of a detonation chamber within said detonation initiation devices. 13. The pulse detonation combustor of claim 1, wherein said main combustion chamber further comprises at least one input port through which at least one of a fuel and a gas enters said main combustion chamber. 14. The pulse detonation combustor of claim 1, wherein at least two detonation initiation devices initiates said first detonation. 15. The pulse detonation combustor of claim 1, wherein at least one of said detonation initiation devices projects a flow into said main combustion chamber in a downstream direction with respect to said main combustion chamber. 16. The pulse detonation combustor of claim 1, wherein said main combustion chamber has a cylindrical shape. 17. The pulse detonation combustor of claim 1, wherein an exit portion of at least one of said detonation initiation devices has a circular cross-section. 18. The pulse detonation combustor of claim 1, wherein each of said detonation initiation devices comprises an exit portion on a surface of said main combustion chamber and each of said exit portions are co-planar with respect to each other. 19. The pulse detonation combustor of claim 1, wherein said plurality of detonation initiation devices are positioned centrally with respect to a centerline of said main combustion chamber. 20. The pulse detonation combustor of claim 1, wherein a centerline of at least one of said detonation initiation devices is parallel to a centerline of said main combustion chamber. 21. The pulse detonation combustor of claim 1, wherein each of said detonation initiation devices has an operational frequency, and a frequency of detonations within said main combustion chamber is related to said operational frequency multiplied by the number of said detonation initiation devices. 22. The pulse detonation combustor of claim 1, wherein each of said main combustion chamber and said pulse detonation initiator uses a same fuel/gas mixture. 23. A pulse detonation combustor, comprising: a main combustion chamber; and a plurality of pulse detonation initiators coupled to said main combustion chamber, wherein at least one of said pulse detonation initiators initiates a first detonation within said main combustion chamber out-of-phase with another of said pulse detonation initiators initiating a second detonation within said main combustion chamber and wherein each of said pulse detonation initiators operates out-of-phase with the remaining of said pulse detonation initiators. 24. The pulse detonation combustor of claim 23, wherein at least one of said pulse detonation initiators is located within said main combustion chamber. 25. The pulse detonation combustor of claim 23, wherein a frequency of detonations within said main combustion chamber is within the range of 100 to 400 Hz. 26. The pulse detonation combustor of claim 23, wherein a frequency of detonations within said main combustion chamber is at least 100 Hz. 27. The pulse detonation combustor of claim 23, wherein each of said pulse detonation initiators further comprises an exit portion positioned at a surface of said main combustion chamber. 28. The pulse detonation combustor of claim 27, wherein at least one of said exit portions is positioned on said surface such that a flow from said at least one exit portion enters said main combustion chamber perpendicular to said surface. 29. The pulse detonation combustor of claim 23, wherein said plurality of pulse detonation initiators are positioned symmetrically with respect to said main combustion chamber. 30. The pulse detonation combustor of claim 23, wherein the operational frequency of each of said pulse detonation initiators is in the range of 20 to 100 Hz. 31. The pulse detonation combustor of claim 23, wherein each of said pulse detonation initiators comprises a nozzle coupled to said main combustion chamber. 32. The pulse detonation combustor of claim 31, wherein an area of an exit opening of said nozzle is smaller than an area of a detonation chamber within said pulse detonation initiators. 33. The pulse detonation combustor of claim 23, wherein said main combustion chamber further comprises at least one input port through which at least one of a fuel and a gas enters said main combustion chamber. 34. The pulse detonation combustor of claim 23, wherein at least two pulse detonation initiators initiates said first detonation. 35. The pulse detonation combustor of claim 23, wherein at least one of said pulse detonation initiators projects a flow into said main combustion chamber in a downstream direction with respect to said main combustion chamber. 36. The pulse detonation combustor of claim 23, wherein said main combustion chamber has a cylindrical shape. 37. The pulse detonation combustor of claim 23, wherein an exit portion of at least one of said pulse detonation initiators has a circular cross-section. 38. The pulse detonation combustor of claim 23, wherein each of said pulse detonation initiators comprises an exit portion on a surface of said main combustion chamber and each of said exit portions are co-planar with respect to each other. 39. The pulse detonation combustor of claim 23, wherein said plurality of pulse detonation initiators are positioned centrally with respect to a centerline of said main combustion chamber. 40. The pulse detonation combustor of claim 23, wherein a centerline of at least one of said pulse detonation initiators is parallel to a centerline of said main combustion chamber. 41. The pulse detonation combustor of claim 23, wherein each of said pulse detonation initiators has an operational frequency, and a frequency of detonations within said main combustion chamber is related to said operational frequency multiplied by the number of said pulse detonation initiators. 42. The pulse detonation combustor of claim 23, wherein each of said main combustion chamber and said plurality of said pulse detonation initiators use a same fuel/gas mixture.