Inlet particle separator system for a gas turbine engine

摘要

Embodiments include an inlet particle separator system for a gas turbine engine. The inlet particle separator system includes an inertial particle separator that separates incoming air into a cleaned air flow and a scavenge flow. Embodiments may also include an ejector that provides a draw on a scavenge duct and entrains the scavenge flow into a charged flow, e.g., such as the output of a first stage fan. The ejector may have a variable output.

主权项

1. An inlet particle separator system for a gas turbine engine, comprising:
a separator inlet structured to receive a vitiated air flow; an inertial particle separator in fluid communication with the separator inlet positioned upstream of a fan, wherein the inertial particle separator includes an outer flowpath wall and an inner flowpath wall that define an inlet pathway to receive the vitiated air flow and discharge a cleaned air flow and a scavenge flow, a first portion of the inlet pathway extending radially outward to an apex and a second portion of the inlet pathway extending radially inward from the apex such that scavenge flow is directed radially outward towards the outer flowpath wall; a flow splitter having an intermediate outer flowpath wall and an intermediate inner flowpath wall positioned downstream of the inertial particle separator; a scavenge flowpath defined by the intermediate outer flowpath wall of the flow splitter and the outer flowpath wall of the inlet pathway positioned to receive the scavenge flow from the inertial particle separator; a cleaned air flowpath defined by the intermediate inner flowpath wall of the flow splitter and the inner flowpath wall of the inlet pathway positioned to receive the cleaned air flow from the inertial particle separator; a variable output ejector in fluid communication with said flowpaths, wherein said variable output ejector is structured to provide a variable draw on the scavenge flowpath using a portion of the cleaned air flow as a motive fluid for operating said variable output ejector; and a cleaned air engine inlet in fluid communication with the cleaned air flowpath, wherein the cleaned air engine inlet is structured to receive the balance of the cleaned air flow and to direct the balance into the gas turbine engine as at least one of a core flow and a fan bypass flow of the gas turbine engine.