United Technologies Corporation

Alexander Vranos

William M Proscia

Arthur S Kesten

Barry C Schlein

Richard Roberts

David H Rummel

A stream of hydrocarbon fuel is catalytically decomposed to produce hydrogen and lower molecular weight fuel fragments, which may separated by molecular size. The hydrogen and low molecular weight fuel fragments are introduced along with a stream of nondecomposed hydrocarbon fuel into the combustor of a high speed propulsion unit. The method results in a wider combustor operating range, with higher combustion rates and increased flame stability, achieved through more rapid diffusional mixing. The process effectively extends the operating limits of gas turbines, and especially ramjet and scramjet combustors.

Method and apparatus to enhance combustion rates and extend extinction

A two-stage premix combustor in which the primary flow flameholder and secondary flow flameholders are axially separated and each is arranged for optimum emissions control, with the fuel injected, atomized and at least partially vaporized external to the burning zone.

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Ellington, CT, United States of America

Alexander Vranos