A combustor for a gas turbine engine includes a liner surrounding a fuel and air mixing body. A fuel supply passage communicates into an open fuel plenum downstream of the fuel supply passage. A wall of the mixing body has air openings to receive air flow, and communicate air into mixing passages. The mixing passages pass through the fuel plenum. Fuel openings in the mixing passages to allow fuel to flow from the mixing passage and mix with the air. There are passage sections extending downstream of the fuel plenum, such that the mixed air and fuel travels downstream of the fuel plenum and into a combustion chamber. A gas turbine engine is also disclosed.

The disclosure relates to a gas-heated infrared radiation emitter comprising at least one radiating screen, which is for example made of ceramic and/or metal, in the form of at least one plate comprising a lower main surface and an upper main surface that are distant from each other, and a plurality of through-prisms, which are preferably hollow, extending from the lower main surface to the upper main surface, each prism being defined by a polygonal base and by an axis. The prisms may be juxtaposed with one another so that their polygonal bases form a tiling of at least one portion of the lower and upper main surfaces of said plate.