Ignition method and apparatus using broadband laser energy

F - Mech Eng,Light,Heat,Weapons – 02 – P

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F02P 23/04 (2006.01) F02C 7/264 (2006.01)

Patent

CA 2207696

An ignition apparatus for a combustor includes a broadband laser energy source that emits laser energy into the combustor, the broadband laser energy having at least two fundamental wavelengths, to produce a plasma that ignites a combustible mixture therein. In one embodiment, laser energy in the ultraviolet and infrared regions are emitted into the combustor. Intensity and time characteristics for the laser energy including fluence, pulse duration, repetition rate, peak intensity and average intensity can also be controlled for one or more of the fundamental wavelengths to further enhance the ignition and combustion processes.

Appareil d'allumage pour chambre à combustion, comprenant, comme source d'énergie, un laser à large bande, qui émet de l'énergie laser dans la chambre à combustion. L'énergie laser à large bande compte au moins deux longueurs d'onde fondamentales qui produisent un plasma qui allume le mélange combustible dans la chambre à combustion. Dans une version privilégiée, l'énergie laser qui est émise dans la chambre à combustion se situe dans la gamme des rayons ultraviolets et des rayons infrarouges. Les caractéristiques d'intensité et de temps de l'énergie laser, notamment la fluence, la durée de l'impulsion, la fréquence de répétition, l'intensité maximale et l'intensité moyenne peuvent être réglées pour une ou plusieurs des longueurs d'onde fondamentales afin de rendre encore plus performants les procédés d'allumage et de combustion.

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