Flat fan air assist injectors

A multi-point injector comprising:

• a) an injector ring having a liquid opening for receiving liquid from an external source, the opening being in fluid communication with an internal liquid passage within the injector ring, the injector ring including a plurality of injectors, each injector including:
• i) a pair of air channels, each air channel fluidly connected to a respective air inlet, wherein the air channels join one another at a common throat defined in the injector ring and are separated by a land defined in the injector ring extending from the air inlets to a point proximate the throat;
• ii) a liquid inlet defined in the land proximate the throat in fluid communication with the internal liquid passage of the injector ring, wherein the air channels and liquid inlet are in proximity to draw liquid out of the liquid inlet into the throat with air flowing through the air channels;
• and
• iii) a diffuser in fluid communication with the throat, wherein the diffuser has a width that diverges over a length from the throat to an outlet of the injector, wherein the diffuser includes an impingement surface defined in the injector ring opposed to the liquid inlets, and wherein each liquid inlet is configured to inject liquid against the impingement surface to form a fan of liquid spray diverging outward through the diffuser thereof.

A multi-point injector comprising:

• a) a liquid distributor ring having a liquid opening for receiving liquid from an external source;
• b) an injection manifold ring mounted to the liquid distributor ring with an internal liquid passage in fluid communication with the liquid opening, the internal liquid passage defined between the liquid distributor ring and the injection manifold ring, wherein the injection manifold ring includes a plurality of injectors, each injector including:
• i) a pair of air channels, each air channel fluidly connected to a respective air inlet defined radially through the injection manifold ring, wherein the air channels join one another at a common throat defined in the injection manifold ring and are separated by a land defined in the injection manifold ring extending from the air inlets to a point proximate the throat;
• ii) a liquid inlet defined in the land proximate the throat in fluid communication with the internal liquid passage, wherein the air channels and liquid inlet are in proximity to draw liquid out of the liquid inlet into the throat with air flowing through the air channels;
• and
• iii) a diffuser in fluid communication with the throat, wherein the diffuser has a width that diverges over a length from the throat to an outlet of the injector;
• and
• c) an impingement ring mounted to the injection manifold ring, wherein the impingement ring includes an impingement surface disposed opposed to the liquid inlet of the injection manifold ring, and wherein each liquid inlet is configured to inject liquid against the impingement surface to form a fan of liquid spray diverging outward through the diffuser thereof.