Stator vane support with anti-rotation features

A gas turbine engine, comprising:

• a compressor section;
• and
• a turbine section, wherein the turbine section comprises:
• a plurality of stator vanes, each stator vane in the plurality of stator vanes being monolithic, each stator vane in the plurality of stator vanes comprising:
• a base coupled to an inner engine structure;
• a vane;
• an anti-rotation end disposed radially outward from the base, the vane extending from the base to the anti-rotation end, the anti-rotation end defining a radially outer surface, the anti-rotation end comprising a first protrusion extending radially outward from the radially outer surface, a second protrusion extending radially outward from the radially outer surface and disposed circumferentially adjacent to each first protrusion, and an anti-rotation recess defining an anti-rotation void, the anti-rotation recess disposed between, and defined by, each first protrusion and each second protrusion;
• and
• a vane support, comprising:
• an inner diameter surface opposite an outer diameter surface;
• a plurality of anti-rotation lugs, each anti-rotation lug defining a protrusion extending from the inner diameter surface, wherein each anti-rotation lug comprises a first surface opposite a second surface, wherein each anti-rotation lug is configured to interface with the anti-rotation end of an adjacent stator vane in the plurality of stator vanes, and wherein each anti-rotation lug is disposed within the anti-rotation recess of the adjacent stator vane and between each first protrusion and each second protrusion of the adjacent stator vane;
• a plurality of first recesses, each first recess defining a first void on the inner diameter surface proximate the first surface of an adjacent anti-rotation lug in the plurality of anti-rotation lugs, each first recess having a first inner surface;
• and
• a plurality of second recesses, each second recess defining a second void on the inner diameter surface proximate the second surface of the adjacent anti-rotation lug, each second recess having a second inner surface, wherein:
• the first inner surface of each first recess and the second inner surface of each second recess comprise a hemispherical shaped surface relative to the inner diameter surface, and
• each stator vane in the plurality of stator vanes is configured to thermally expand in a radial direction relative to the base and reduce a gap between the anti-rotation void of each stator vane in the plurality of stator vanes and an adjacent anti-rotation lug.