Flow path routing within a gas turbine engine

A method of communicating flow through a gas turbine engine having multiple flow paths comprising:

• moving core flow along a core flow path from a compressor section to an exhaust section;
• selectively communicating a first amount of bypass flow from a bypass flow path defined by a bypass duct to the exhaust section or a second amount of bypass flow from the bypass flow path to the exhaust section, the first amount different than the second amount;
• wherein the exhaust section includes a tailcone, and an outer diameter of the tailcone defines a radially inner boundary of the core flow path relative to an engine longitudinal axis of the gas turbine engine;
• wherein the bypass duct is a secondary bypass duct and the bypass flow path is an intermediate bypass flow path;
• communicating the first amount or the second amount of bypass flow radially across a primary bypass duct that provided a fan discharge bypass flow path radially between the intermediate bypass flow path and the core flow path;
• and
• wherein the first amount comprises no bypass flow.

A method of communication flow through a gas turbine engine having multiple flow paths comprising:

• moving core flow along a core flow path from a compressor section to an exhaust section;
• selectively communicating a first amount of bypass flow from a bypass flow path defined by a bypass duct to the exhaust section or a second amount of bypass flow from the bypass flow path to the exhaust section, the first amount different than the second amount;
• wherein the exhaust section includes a tailcone, and an outer diameter of the tailcone defines a radially inner boundary of the core flow path relative to an engine longitudinal axis of the gas turbine engine;
• wherein the bypass duct is a secondary bypass duct and the bypass flow path is an intermediate bypass flow path;
• communicating the first amount or the second amount of bypass flow radially across a primary bypass duct that provides a fan discharge bypass flow path radially between the intermediate bypass flow path and the core flow path;
• wherein the step of communicating the first amount or the second amount of bypass flow radially across the primary bypass duct includes communicating the first amount or the second amount in a flow passage defined between an inlet and an outlet of at least one vane, the at least one vane extending radially from the bypass flow path to the exhaust section;
• and
• wherein the at least one vane is an array of vanes including a first set of vanes and a second set of vanes, and further comprising communicating flow from the bypass flow path to the core flow path with the first set of vanes, and communicating flow from the fan discharge bypass flow path to the core flow path with the second set of vanes.