Systems and methods for suppressing combustion driven pressure fluctuations with a premix combustor having multiple premix times

摘要

A combustor having a combustion chamber is provided with an external flow sleeve and a combustor liner surrounding the combustion chamber. A plurality of flow channels are provided on the combustor liner and a plurality of nozzles are disposed at predetermined locations on the flow channels. The locations of the nozzles are selected to provide different mixing times for fuel injected through the nozzles.

主权项

1. A method of suppressing combustor dynamics comprising:
providing oxidizing fluid to a plurality of flow channels disposed on an outer surface of a combustor liner, wherein the plurality of flow channels are defined between respective adjacent protruding helical fins of an array of protruding helical fins, and wherein the array of protruding helical fins is integrally formed on the outer surface of the combustor liner; providing a plurality of fuel nozzles; injecting fuel through at least two fuel nozzles of the plurality of fuel nozzles into at least two respective flow channels of the plurality of flow channels to generate a plurality of streams of fuel and oxidizing fluid, the at least two fuel nozzles being disposed at respective predetermined axial locations within the at least two respective flow channels thereby defining at least two respective flow path lengths between each of the at least two fuel nozzles and a combustion chamber, wherein the at least two respective flow path lengths comprise at least two different flow path lengths; and combusting each of the plurality of streams of fuel and oxidizing fluid in the combustion chamber.