Turbine engine structure with an integral fluid reservoir

An apparatus for a turbine engine, comprising:

• an engine structure including an inner case, an outer case, a plurality of vanes, a flowpath, a reservoir cavity and a first feed passage;
• the inner case extending axially along and circumferentially around an axis, and the inner case forming an inner boundary of the flowpath in the engine structure;
• the outer case extending axially along and circumferentially around the inner case, and the outer case forming an outer boundary of the flowpath in the engine structure;
• the plurality of vanes arranged circumferentially around the axis, each of the plurality of vanes extending radially across the flowpath from the inner case to the outer case, and the plurality of vanes comprising a first vane;
• the reservoir cavity extending radially within the outer case between an inner cavity side and an outer cavity side, and the inner cavity side having a concave sectional geometry;
• and
• the first feed passage extending, within the engine structure and through the first vane, between an inlet into the first feed passage and an outlet from the first feed passage, and the inlet into the first feed passage disposed in the inner cavity side at an apex of the concave sectional geometry.

An apparatus for a turbine engine, comprising:

• an engine structure including an inner case, an outer case, a plurality of vanes, a flowpath, a reservoir cavity, a first feed passage and a second feed passage;
• the inner case extending axially along and circumferentially around an axis, and the inner case forming an inner boundary of the flowpath in the engine structure;
• the outer case extending axially along and circumferentially around the inner case, and the outer case forming an outer boundary of the flowpath in the engine structure;
• the plurality of vanes arranged circumferentially around the axis, each of the plurality of vanes extending radially across the flowpath from the inner case to the outer case, and the plurality of vanes comprising a first vane;
• the reservoir cavity embedded within the outer case;
• the first feed passage fluidly coupled with the reservoir cavity and extending through the first vane into the inner case, a first segment of the first feed passage angularly offset from a second segment of the first feed passage by a first included angle;
• and
• the second feed passage fluidly coupled with the reservoir cavity and extending through the first vane into the inner case, a first segment of the second feed passage angularly offset from a second segment of the second feed passage by a second included angle that is different than the first included angle.