SHROUD ASSEMBLY FOR A GAS TURBINE ENGINE

摘要

A shroud assembly for a gas turbine engine includes a shroud, hanger, and a hanger support mounted adjacent to a plurality of blades. The hanger can have an interior chamber defining a cooling circuit with a particle separator located within the interior chamber. The particle separator can have an inlet for accepting a flow of cooling fluid, such that a the flow of cooling fluid separates into a major flow and a minor flow carrying particles or particulate matter along the minor flow into a particle collector comprising at least a portion of the particle separator. Particles become constrained to the minor flow and pass into the particle collector, while the major flow is separated into the remaining area of the interior chamber to remove the particles from the flow of cooling fluid passing into the interior chamber.

主权项

1. A shroud assembly for a turbine engine having a compressor, a combustor, and a turbine within a casing, with the turbine having a plurality of annularly-arranged fixed vanes defining a nozzle and a plurality of annularly-arranged rotating blades paired with the fixed vanes to define one stage of the turbine, the shroud assembly comprising:
a shroud having a front side confronting the blades and a back side opposite the front side; a hanger configured to couple the shroud with the casing and defining an interior chamber, and having a fore face with an inlet passage extending through the fore face and fluidly coupled to the chamber, and an aft face with an outlet passage extending through the aft face and fluidly coupled to the chamber; a cooling circuit having a first portion fluidly coupled to the inlet passage and supplying a cooling fluid stream to the chamber through the inlet passage and a second portion fluidly coupled to the outlet passage and defining a scavenge flow passage; and at least one particle separator located within the chamber and having a scavenge flow inlet spaced from and confronting the inlet passage to define a gap between the scavenge flow inlet and the inlet passage, a scavenge conduit fluidly coupled to the scavenge flow passage, and a choke fluidly coupling the scavenge flow inlet to the scavenge conduit; wherein the gap is sized such that a first portion of the cooling fluid stream flows out through the gap, and the inlet passage is aligned with the scavenge inlet such that a second portion of the cooling fluid stream flows directly from the inlet passage, across the gap, and into the scavenge inlet, with particles entrained in the cooling fluid stream are primarily constrained by momentum in the second portion of the cooling fluid stream to define a scavenge fluid stream.