Asymmetric radial spline seal for a gas turbine engine

A shroud apparatus for a gas turbine engine, comprising:

• an annular array of arcuate shroud segments, each shroud segment having:
• an arcuate bottom wall defining an arcuate inner flowpath surface, spaced-apart forward and aft walls extending radially outward from the bottom wall, and spaced-apart side walls extending radially outward from the bottom wall and between the forward and aft walls, each side wall defining an end face;
• the shroud segments arranged such that a gap is present between the end faces of adjacent shroud segments;
• wherein each end face includes:
• an axial slot extending in a generally axial direction along the end face;
• a first radial slot extending in a generally radial direction along the end face, and intersecting the axial slot;
• a plurality of axial spline seals, each axial spline seal received in the axial slots of each pair of adjacent end faces;
• and
• a plurality of first radial spline seals, each first radial spline seal having an L-shape with radial and axial legs, each radial leg of the first radial spline seals being two to three times longer than each axial leg of the first radial spline seals, wherein for each pair of adjacent end faces:
• the radial leg of the first radial spline seal is received in the first radial slots, and the axial leg of the first radial spline seal is received in the axial slots and lies against the axial spline seal;
• wherein each end face further comprises:
• a second radial slot extending in a generally radial direction along the end face, the second radial slot intersecting the axial slot;
• and
• a plurality of second radial spline seals, each second radial spline seal having an L-shape with radial and axial legs, each radial leg of the second radial spline seals being two to three times longer than each axial leg of the second radial spline seals, wherein for each pair of adjacent end faces:
• the radial leg of the second radial spline seal is received in the second radial slots, and the axial leg of the second radial spline seal is received in the axial slots and lies against the axial spline seal.