Abstract: A detonation chamber and a pulse detonation combustor including a detonation chamber, wherein the detonation chamber includes a plurality of initiation obstacles and at least one injector in fluid flow communication with each of the plurality of initiation obstacles. The plurality of initiation obstacles are disposed on at least a portion of an inner surface of the detonation chamber with each of the plurality of initiation obstacles defining a low pressure region at a trailing edge. The plurality of initiation obstacles are configured to enhance a turbulence of a fluid flow and flame acceleration through the detonation chamber. The at least one injector in provides a cooling fluid flow to each of the plurality of initiation obstacles, wherein the cooling fluid flow is one of a fuel, a combination of fuels, air, or a fuel/air mixture.

Abstract: Methods and systems for a feed injector are provided. The feed injector system includes a plurality of annular channels that are substantially concentric about a longitudinal axis. The plurality of annular channels direct a flow of fluid substantially axially therethrough from a respective source to a reaction zone. The feed injector system also includes a swirl member extending into the fluid flow path defined in at least one of the plurality of annular channels wherein the swirl member is configured to impart a circumferential flow direction to fluid flowing through the at least one annular channel.

Abstract: An injector tip for a nozzle includes a center body having a plurality of center body openings at a distal end configured to inject a fuel flow into a combustion zone of a combustor. One or more fuel passages are arranged around the center body and are configured to inject a fuel slurry into the combustion zone. One or more oxygen passages are arranged around the center body and are configured to inject an oxygen flow into the combustion zone.

Abstract: A detonation chamber and a pulse detonation combustor including a detonation chamber, wherein the detonation chamber includes a plurality of initiation obstacles and at least one injector in fluid flow communication with each of the plurality of initiation obstacles. The plurality of initiation obstacles are disposed on at least a portion of an inner surface of the detonation chamber with each of the plurality of initiation obstacles defining a low pressure region at a trailing edge. The plurality of initiation obstacles are configured to enhance a turbulence of a fluid flow and flame acceleration through the detonation chamber. The at least one injector in provides a cooling fluid flow to each of the plurality of initiation obstacles, wherein the cooling fluid flow is one of a fuel, a combination of fuels, air, or a fuel/air mixture.

Abstract: A feed injector system comprises a movable central member, a first member substantially concentric with the central member to define a first channel for conveying a first fluid oxidizer stream, a second member substantially concentric with the first member to define a second channel for conveying a fuel feed, and a third member substantially concentric with the second member to define a third channel for conveying a second fluid oxidizer steam. The first member and the second member are configured to enhance instability in the fuel feed emanating from the second channel.

Abstract: A feed injector system comprises a movable central member, a first member substantially concentric with the central member to define a first channel for conveying a first fluid oxidizer stream, a second member substantially concentric with the first member to define a second channel for conveying a fuel feed, and a third member substantially concentric with the second member to define a third channel for conveying a second fluid oxidizer steam. The first member and the second member are configured to enhance instability in the fuel feed emanating from the second channel.

Abstract: A feed injector system comprises substantially concentric channels with one being configured for pneumatically conveying pulverized solid fuel feed from a respective source to a reaction zone and another configured to impart convey a fluid oxidizer stream with and without swirl.

Abstract: Methods and systems for a feed injector are provided. The feed injector system includes a plurality of annular channels that are substantially concentric about a longitudinal axis. The plurality of annular channels direct a flow of fluid substantially axially therethrough from a respective source to a reaction zone. The feed injector system also includes a swirl member extending into the fluid flow path defined in at least one of the plurality of annular channels wherein the swirl member is configured to impart a circumferential flow direction to fluid flowing through the at least one annular channel.