GAS TURBINE ENGINE AIR FLOW STRAIGHTENING UNIT WITH IMPROVED AERODYNAMIC CHARACTERISTICS Russian patent published in 2020 - IPC F01D9/04 F01D5/14 

FIELD: engine building.

SUBSTANCE: airflow straightening unit includes gas turbine engine suspension pylon on aircraft wing, straightening grid and structural post. Straightening grid comprises blade with front edge and trailing edge, wherein blade and post are located radially around axis of gas turbine engine. Structural post comprises inlet end part, outlet part and intermediate part. Inlet end part comprises front edge aligned in circumferential direction with blade front edge and having profile identical to profile of inlet end of blade, wherein input end part is limited at output by axial position, called input end point. Dimensions of the outlet part are such that it forms a gas turbine engine suspension pylon shim. Intermediate part connects inlet end part with outlet part containing back wall located between input extreme point and output extreme point with preset axial position. Input end point is located in axial direction from front edge of post at distance equal to 0.2 to 0.5 of length of axial chord of straightening blade. Output end point is located at a distance in the axial direction from the front edge of the post, which exceeds the length of the axial chord of the straightening blade. Angle of the tangent to the back wall in the input end point is equal to the angle of the tangent to the wall at the output end point with accuracy of one degree. Another invention relates to double-flow gas turbine engine comprising said airflow straightening unit.

EFFECT: group of inventions allows to reduce airflow swirling at the back of the structural rack.

4 cl, 6 dwg