Combustor with fuel staggering for flame holding mitigation

摘要

The present application provides a combustor. The combustor may include an air flow path with a flow of air therein. A flow obstruction may be positioned within the air flow path and cause a wake or a recirculation zone downstream thereof. A number of fuel injectors may be positioned downstream of the flow obstruction. The fuel injectors may inject a flow of fuel into the air flow path such that the flows of fuel and air in the wake or the recirculation zone do not exceed a flammability limit.

主权项

1. A combustor, comprising:
an air flow path with a flow of air therein; a flow obstruction positioned within the air flow path; the flow obstruction causing a wake or a recirculation zone downstream thereof; a first fuel injector positioned downstream and outside of the wake or the recirculation zone of the flow obstruction, the first fuel injector configured to inject fuel at a first fuel rate; and a second fuel injector, adjacent to and axially aligned with the first fuel injector, positioned downstream and substantially in line with the flow obstruction, the second fuel injector within the wake or the recirculation zone of the flow obstruction, the second fuel injector configured to inject fuel at a second fuel rate; wherein the first and second fuel injectors are configured to inject a flow of fuel into the air flow path such that flows of fuel and air in the wake or the recirculation zone do not exceed a flammability limit therein; and the first fuel rate is different than the second fuel rate; and wherein the first and second fuel injectors are configured to inject fuel into the air flow path at the same time and wherein the first and second fuel injectors comprise an airfoil-like shape, such that air flows about each side of the first and second fuel injectors.