COMBUSTOR CAP ASSEMBLY

摘要

A combustor cap assembly includes an annular shroud and an impingement plate coupled to the shroud. The impingement plate at least partially defines a plurality of impingement cooling holes and a cooling flow return passage. A cap plate is coupled to the impingement plate. The cap plate includes an impingement side which faces a second side portion of the impingement plate where the impingement side is axially spaced from the second side portion to define an impingement air plenum therebetween. The cooling flow return passage is in fluid communication with the impingement air plenum. A fluid conduit extends from a first side portion of the impingement plate towards a first end portion of the shroud. The fluid conduit is in fluid communication with the cooling flow return passage and provides for fluid communication out of the impingement air plenum.

主权项

1. A combustor cap assembly, comprising:
an annular shroud having a first end portion and a second end portion; an impingement plate coupled to the shroud proximate to the second end portion, the impingement plate including a first side portion, a second side portion and an outer band portion, the impingement plate at least partially defining a plurality of impingement cooling holes and a cooling flow return passage; a cap plate coupled to the impingement plate, the cap plate having an impingement side which faces the second side portion of the impingement plate, the impingement side being axially spaced from the second side portion to define an impingement air plenum therebetween, wherein the cooling flow return passage is in fluid communication with the impingement air plenum; and a fluid conduit in fluid communication with the cooling flow return passage, wherein the fluid conduit extends from the first side portion of the impingement plate towards the first end portion of the shroud.