Turbine vane with film cooling slots

摘要

A stator vane with endwalls having film cooling diffusion slots that open onto the hot gas surface. Each diffusion slot is formed as a row of one or more separated diffusion slots each having a serpentine flow channel and one or more metering inlet holes to supply spent cooling air from an impingement chamber to the diffusion slots. The metering inlet holes meter the flow of cooling air into the serpentine channels, the serpentine channels provide convection cooling for the endwalls, and the diffusion slots diffuse the cooling air into a layer of film cooling air onto the hot gas surface of the endwalls.

主权项

1. An air cooled stator vane for a gas turbine engine comprising:
an airfoil extending between an inner diameter endwall and an outer diameter endwall; an impingement cover plate secured to a backside of each endwall to form an impingement chamber for backside cooling of the endwall; a plurality of impingement cooling holes formed within the two cover plates; a diffusion slot opening onto a hot surface of each of the two endwalls; the diffusion slot having a serpentine flow channel upstream of the diffusion slot and a metering inlet hole upstream of the serpentine flow channel; the metering inlet hole is connected to the impingement chamber to supply cooling air to the diffusion slot; the diffusion slot is formed into a row of diffusion slots and serpentine flow channels each separated by a rib; and, each separated serpentine flow channel and diffusion slot having a metering inlet hole connected to supply cooling air to the diffusion slot.