Gas turbine engine and blocker door assembly

A blocker door assembly for a gas turbine engine comprising:

• a plurality of blocker doors circumferentially spaced about an engine axis, wherein each blocker door is constructed and arranged to move in a circumferential direction to control air flow through a respective one of a plurality of passages in an adjacent fixture;
• and
• an aerodynamically shaped sync-ring concentrically located about the engine axis, disposed in an annular first duct in direct communication with the plurality of passages, and engaged to each one of the plurality of blocker doors for simultaneous operation;
• wherein the aerodynamically shaped sync-ring is located downstream from the plurality of blocker doors.

A blocker door assembly for a gas turbine engine comprising:

• a plurality of blocker doors circumferentially spaced about an engine axis, wherein each blocker door is constructed and arranged to move in a circumferential direction to control air flow through a respective one of a plurality of passages in an adjacent fixture;
• and
• an aerodynamically shaped sync-ring concentrically located about the engine axis, disposed in an annular first duct in direct communication with the plurality of passages, and engaged to each one of the plurality of blocker doors for simultaneous operation;
• wherein the sync-ring has an aerodynamic cross-sectional profile for minimizing air flow resistance in the first duct;
• and
• wherein the sync-ring spans substantially axially between circumferentially continuous leading and trailing edges, and wherein the leading and trailing edges are radially displaced from one-another for mixing of air flow.

A blocker door assembly for a gas turbine engine comprising:

• a plurality of blocker doors circumferentially spaced about an engine axis, wherein each blocker door is constructed and arranged to move in a circumferential direction to control air flow through a respective one of a plurality of passages in an adjacent fixture;
• and
• an aerodynamically shaped sync-ring concentrically located about the engine axis, disposed in an annular first duct in direct communication with the plurality of passages, and engaged to each one of the plurality of blocker doors for simultaneous operation;
• wherein the fixture is a heat exchanger operative to flow a cooling airstream received from an annular second duct and expelled into the first duct.