Power plants – Combustion products used as motive fluid
Patent
1989-02-28
1990-08-14
Stout, Donald E.
Power plants
Combustion products used as motive fluid
60 39821, 123143B, 431258, F02G 1005
Patent
active
049476408
ABSTRACT:
A photon ignition system for igniting the air/fuel spray within a combustion chamber of a gas turbine engine is comprised of a photon source 20, a photon transmission means 22 and a focussing means 24. The source 20 has an output wavelength characteristic suitable for being absorbed by the hydrocarbon fuel droplets within the fuel spray. In accordance with one embodiment of the invention the source 20 comprises an ultraviolet flashlamp having spectral characteristics which are selected to be strongly absorbed by hydrocarbon fuel. In another embodiment of the invention the source 20 comprises a laser, such an excimer laser, having an output pulse with wavelengths within the strong absorption range of hydrocarbon fuel. The photon output of the source 20 is focussed within an optimum region of the fuel spray for igniting one or more droplets therein due to the absorption and subsequent heating of the droplets of the focussed photon output.
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Brad E. Forch et al., Technical Report BRL-TR-27409, U.S. Army Ballistic Research Laboratory, "Photochemical Ignition Studies. II. Oxygen-Atom Two-Photon Resonance Effects", Jun. 1986.
Andrezik W. Miziolek et al., Technical Report BRL-TR-2644, U.S. Army Ballistic Research Laboratory, "Photochemical Ignition Studies. I. Laser Ignition of Flowing Premixed Gases", Feb. 1985.
Few Jimmy D.
Lewis James W. L.
Stout Donald E.
University of Tennessee Research Corporation
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