Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Reexamination Certificate
2004-01-21
2009-02-17
Wong, Edna (Department: 1795)
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
C431S001000, C431S002000, C044S904000
Reexamination Certificate
active
07491300
ABSTRACT:
A method is provided for initiating and sustaining a combustive reaction in a solid fuel. The method includes generating at least one pulsed optical signal and directing the pulsed optical signal to a plurality of ignition points within at least one combustion chamber containing a solid fuel. The pulsed optical signal is generated by an optical source, e.g. a laser pump, and modulated using an intensity profiler. The intensity profiler modulates the pulsed optical signal to initially have a first peak power sufficient to initiate a combustive reaction in a solid fuel. The intensity profiler further modulates the pulsed optical signal to subsequently have a second peak power sufficient to sustain the combustive reaction until sufficient exothermic energy is released by the combustive reaction to make the reaction self-sustaining.
REFERENCES:
patent: 4276463 (1981-06-01), Kime
patent: 5756924 (1998-05-01), Early
Vorob'ev et al., “Laser Pulse Combustion of Solid Fuel”, Pis'ma v Zhurnal Tekhnicheskoi Fiziki (no month, 1990), vol. 16, No. 19, pp. 79-83. Abstract Only.
Zhang, “Laser-Induced Ignition of Pulverized Fuel Particles”, Combustion and Flame (no month, 1992), vol. 90, pp. 134-142.
Harness & Dickey & Pierce P.L.C.
The Boeing Company
Wong Edna
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